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Which text uses the word nauseous in its traditional sense?
[ "Everyone seemed to enjoy the magnolia-scented candle, but Xavier found the smell rather nauseous.", "Everyone seemed to enjoy the magnolia-scented candle, but it made Xavier feel rather nauseous." ]
0
closed choice
grade10
language science
writing-strategies
Word usage and nuance
Explore words with new or contested usages
Words change in meaning when speakers begin using them in new ways. For example, the word peruse once only meant to examine in detail, but it's now also commonly used to mean to look through in a casual manner. When a word changes in meaning, its correct usage is often debated. Although a newer sense of the word may be more commonly used, many people consider a word's traditional definition to be the correct usage. Being able to distinguish the different uses of a word can help you use it appropriately for different audiences. Britney perused her notes, carefully preparing for her exam. The traditional usage above is considered more standard. David perused the magazine, absentmindedly flipping through the pages. The nontraditional usage above is now commonly used, but traditional style guides generally advise against it.
The second text uses nauseous in its traditional sense: causing disgust or nausea. Everyone seemed to enjoy the magnolia-scented candle, but Xavier found the smell rather nauseous. The first text uses nauseous in its nontraditional sense: feeling disgusted or nauseated. Everyone seemed to enjoy the magnolia-scented candle, but it made Xavier feel rather nauseous. Most style guides recommend to use the traditional sense of the word nauseous because it is considered more standard.
Compare the motion of two mountain bikers. Which mountain biker was moving at a higher speed?
[ "a mountain biker who moved 170kilometers in 5hours", "a mountain biker who moved 125kilometers in 5hours" ]
0
closed choice
grade2
natural science
physics
Force and motion
Compare the speeds of moving objects
An object's speed tells you how fast the object is moving. Speed depends on both distance and time. Distance tells you how far the object has moved. One unit used to measure distance is the kilometer. Time tells you how long the object has spent moving. One unit used to measure time is the hour. Think about two objects moving for the same amount of time. The object that is moving faster will go a farther distance in that time. It is moving at a higher speed.
Look at the distance each mountain biker moved and the time it took to move that distance. One mountain biker moved 170 kilometers in 5 hours. The other mountain biker moved 125 kilometers in 5 hours. Notice that each mountain biker spent the same amount of time moving. The mountain biker who moved 170 kilometers moved a farther distance in that time. So, that mountain biker must have moved at a higher speed.
Which phrase has a more negative connotation?
[ "look at someone", "glare at someone" ]
1
closed choice
grade4
language science
vocabulary
Shades of meaning
Positive and negative connotation
Connotation is the feeling or idea that goes along with a word or phrase. Some words are close in meaning but have different connotations. For example, think about the words eager and impatient. They both mean wanting something to happen, but they have different connotations. Eager has a positive connotation. It is a nice word. An eager person is happy and excited. Impatient has a negative connotation. It is not a nice word. An impatient person is often pushy and demanding.
Glare at someone has a more negative connotation. If you glare at someone, you look at them in an angry way.
Suppose Trent decides to join the Photography Club. Which result would be a cost?
[ "Trent will save some time. He would have spent more time in the Theater Club than in the Photography Club.", "Trent will give up the chance to be in the Theater Club. He would have had more fun in the Theater Club than in the Photography Club." ]
1
Trent is deciding whether to join the Theater Club or the Photography Club at school. He wants the club he joins to be fun. But he doesn't want it to take up too much time.
closed choice
grade4
social science
economics
Basic economic principles
Costs and benefits
Before you decide to do something, it is often helpful to list costs and benefits. Costs are what you give up or spend when you decide to do something. Costs involve giving up things that you want or need. Benefits are what you gain or save when you decide to do something. Benefits involve gaining something that you want or need.
This result is a cost. It involves giving up or spending something that Trent wants or needs: Trent will give up the chance to be in the Theater Club. He would have had more fun in the Theater Club than in the Photography Club.
Which word would you find on a dictionary page with the following guide words? dad - disgust
[ "drum", "desert" ]
1
closed choice
grade3
language science
reference-skills
Reference skills
Use guide words
Guide words appear on each page of a dictionary. They tell you the first word and last word on the page. The other words on the page come between the guide words in alphabetical order. To put words in alphabetical order, put them in order by their first letters. If the first letters are the same, look at the second letters. If the second letters are the same, look at the third letters, and so on. If one word is shorter, and there are no more letters to compare, then the shorter word comes first in alphabetical order. For example, be comes before bed.
Put the words in alphabetical order. Since desert is between the guide words dad - disgust, it would be found on that page.
Suppose Maria decides to bake lemon muffins. Which result would be a cost?
[ "Maria will give up the chance to eat apple muffins. She thinks apple muffins are tastier than lemon muffins.", "Maria will get to eat more muffins. She can make more lemon muffins than apple muffins." ]
0
Maria is deciding whether to bake apple muffins or lemon muffins. She wants the muffins to be tasty. But she also wants to make a lot of muffins.
closed choice
grade4
social science
economics
Basic economic principles
Costs and benefits
Before you decide to do something, it is often helpful to list costs and benefits. Costs are what you give up or spend when you decide to do something. Costs involve giving up things that you want or need. Benefits are what you gain or save when you decide to do something. Benefits involve gaining something that you want or need.
This result is a cost. It involves giving up or spending something that Maria wants or needs: Maria will give up the chance to eat apple muffins. She thinks apple muffins are tastier than lemon muffins.
Compare the motion of three sailboats. Which sailboat was moving at the lowest speed?
[ "a sailboat that moved 55kilometers north in 5hours", "a sailboat that moved 40kilometers east in 5hours", "a sailboat that moved 45kilometers east in 5hours" ]
1
closed choice
grade3
natural science
physics
Force and motion
Compare the speeds of moving objects
An object's speed tells you how fast the object is moving. Speed depends on both distance and time. Distance tells you how far the object has moved. One unit used to measure distance is the kilometer. Time tells you how long the object has spent moving. One unit used to measure time is the hour. Think about objects moving for the same amount of time. The object that is moving the slowest will go the shortest distance in that time. It is moving at the lowest speed.
Look at the distance each sailboat moved and the time it took to move that distance. The direction each sailboat moved does not affect its speed. Notice that each sailboat moved for 5 hours. The sailboat that moved 40 kilometers moved the shortest distance in that time. So, that sailboat must have moved at the lowest speed.
Which tense does the sentence use? Derek shops for fruit and vegetables.
[ "future tense", "past tense", "present tense" ]
2
closed choice
grade3
language science
verbs
Verb tense
Is the sentence in the past, present, or future tense?
Present tense verbs tell you about something that is happening now. Most present-tense verbs are regular. They have no ending, or they end in -s or -es. Two verbs are irregular in the present tense, to be and to have. You must remember their forms. Past tense verbs tell you about something that has already happened. Most past-tense verbs are regular. They end in -ed. Some verbs are irregular in the past tense. You must remember their past-tense forms. Future tense verbs tell you about something that is going to happen. All future-tense verbs use the word will. Present | Past | Future walk, walks | walked | will walk go, goes | went | will go
The sentence is in present tense. You can tell because it uses a present-tense verb, shops. The verb ends in -s and tells you about something that is true or happening now.
What information supports the conclusion that Zach acquired this trait?
[ "Zach's friend showed him how to ride a bicycle.", "Zach and his mother both ride bicycles.", "Zach rides his bicycle to school." ]
0
Read the description of a trait. Zach can ride a bicycle.
closed choice
grade8
natural science
biology
Genes to traits
Inherited and acquired traits: use evidence to support a statement
Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways. Inherited traits are passed down from biological parents to their offspring through genes. Genes are pieces of hereditary material that contain the instructions that affect inherited traits. Offspring receive their genes, and therefore gain their inherited traits, from their biological parents. Inherited traits do not need to be learned. Acquired traits are gained during a person's life. Some acquired traits, such as riding a bicycle, are gained by learning. Other acquired traits, such as scars, are caused by the environment. Parents do not pass acquired traits down to their offspring.
Which text uses the word travesty in its traditional sense?
[ "Darren realized that his essay about the Space Race was a bit inaccurate, but he still thought it a travesty that such an entertaining essay should receive a poor grade.", "Darren's ill-researched essay about the Space Race received a poor grade because it presented such a travesty of the actual historical events." ]
1
closed choice
grade10
language science
writing-strategies
Word usage and nuance
Explore words with new or contested usages
Words change in meaning when speakers begin using them in new ways. For example, the word peruse once only meant to examine in detail, but it's now also commonly used to mean to look through in a casual manner. When a word changes in meaning, its correct usage is often debated. Although a newer sense of the word may be more commonly used, many people consider a word's traditional definition to be the correct usage. Being able to distinguish the different uses of a word can help you use it appropriately for different audiences. Britney perused her notes, carefully preparing for her exam. The traditional usage above is considered more standard. David perused the magazine, absentmindedly flipping through the pages. The nontraditional usage above is now commonly used, but traditional style guides generally advise against it.
The first text uses travesty in its traditional sense: a ridiculous imitation; a parody. Darren's ill-researched essay about the Space Race received a poor grade because it presented such a travesty of the actual historical events. The second text uses travesty in its nontraditional sense: a disappointment or a tragedy. Darren realized that his essay about the Space Race was a bit inaccurate, but he still thought it a travesty that such an entertaining essay should receive a poor grade. Most style guides recommend to use the traditional sense of the word travesty because it is considered more standard.
Select the gas.
[ "oxygen", "hammer", "ruler", "clothespin" ]
0
closed choice
grade3
natural science
physics
States of matter
Identify solids, liquids, and gases
Solid, liquid, and gas are states of matter. Matter is anything that takes up space. Matter can come in different states, or forms. When matter is a solid, it has a definite volume and a definite shape. So, a solid has a size and shape of its own. Some solids can be easily folded, bent, or broken. A piece of paper is a solid. Also, some solids are very small. A grain of sand is a solid. When matter is a liquid, it has a definite volume but not a definite shape. So, a liquid has a size of its own, but it does not have a shape of its own. Think about pouring juice from a bottle into a cup. The juice still takes up the same amount of space, but it takes the shape of the bottle. Some liquids do not pour as easily as others. Honey and milk are both liquids. But pouring honey takes more time than pouring milk. When matter is a gas, it does not have a definite volume or a definite shape. A gas expands, or gets bigger, until it completely fills a space. A gas can also get smaller if it is squeezed into a smaller space. Many gases are invisible. Air is a gas.
Oxygen is a gas. A gas expands to fill a space. Oxygen can be stored in metal tanks. If oxygen leaks out of the tank, the oxygen will expand into the space around the tank. A clothespin is a solid. A solid has a size and shape of its own. You can open or close a clothespin. But it will still have a size and shape of its own. A ruler is a solid. A solid has a size and shape of its own. If you put a ruler in a box, the ruler will keep its shape. A hammer is a solid. A solid has a size and shape of its own. A hammer is made of iron and wood. Both iron and wood are solids.
Based on this information, what is Amos's phenotype for the body size trait?
[ "a normal-sized body", "a dwarf body" ]
0
In a group of rats, some individuals have a normal-sized body and others have a dwarf body. In this group, the gene for the body size trait has two alleles. The allele for a dwarf body (b) is recessive to the allele for a normal-sized body (B). Amos is a rat from this group. Amos has the heterozygous genotype Bb for the body size gene.
closed choice
grade7
natural science
biology
Genes to traits
Genetics vocabulary: dominant and recessive
All organisms have pieces of hereditary material called genes, which are passed from parents to offspring. Genes contain instructions for building the parts of an organism. An organism's genes affect its observable traits, including its appearance, its behavior, and which diseases it may have. Genes may have different alleles, or forms, that can cause different versions of a trait. For example, flower color is a trait in pea plants. The gene for this trait has two possible alleles. Each allele is represented by an uppercase or lowercase letter. The allele F is for purple flowers, and the allele f is for white flowers. Each pea plant has two alleles for the flower color gene—one allele inherited from each parent. An organism's genotype for a gene is its combination of alleles for that gene. So, a pea plant may have a genotype of FF, Ff, or ff for the flower color gene. An organism's phenotype for a trait is its observable version of that trait, which depends on the organism's combination of alleles. A pea plant may have a phenotype of purple flowers or white flowers for the flower color trait. Some traits, like flower color in pea plants, are controlled by a single gene. Most plants and animals have a genotype made up of two alleles for these traits. These two alleles determine whether an organism is homozygous or heterozygous for the gene. An organism with two identical alleles for a gene is homozygous for that gene. A pea plant with the genotype FF or ff is homozygous for the flower color gene. An organism with two different alleles for a gene is heterozygous for that gene. A pea plant with the genotype Ff is heterozygous for the flower color gene. The types of alleles in an organism's genotype determine the organism's phenotype. Some alleles have types called dominant and recessive. These two types can cause different versions of a trait to appear as the organism's phenotype. A dominant allele causes its version of the trait to appear even when the organism also has a recessive allele for the gene. In pea plants, the F allele, which causes purple flowers, is dominant over the f allele. A pea plant with at least one F allele will have the F allele's version of the flower color trait. So, a plant with the genotype FF or Ff will have purple flowers. A recessive allele causes its version of the trait to appear only when the organism does not have any dominant alleles for the gene. In pea plants, the f allele, which causes white flowers, is recessive to the F allele. A pea plant with only f alleles will have the f allele's version of the flower color trait. So, a plant with the genotype ff will have white flowers.
You need to determine Amos's phenotype for the body size trait. First, consider the alleles in Amos's genotype for the body size gene. Then, decide whether these alleles are dominant or recessive. The allele for a dwarf body (b) is recessive to the allele for a normal-sized body (B). This means B is a dominant allele, and b is a recessive allele. Amos's genotype of Bb has one dominant allele and one recessive allele. An organism with at least one dominant allele for a gene will have the dominant allele's version of the trait. So, Amos's phenotype for the body size trait must be a normal-sized body.
Which is stickier?
[ "gold nugget", "gum" ]
1
closed choice
grade2
natural science
physics
Materials
Compare properties of materials
Every object is made of one or more materials. A material is a type of matter. Wood, glass, metal, and plastic are common materials. A material has different properties. A material's properties tell you how it looks, feels, tastes, or smells.
Sticky is a property. A sticky material can stick to other things. Look at each picture, one at a time. Imagine touching the material shown in each picture. Of the choices, the gum is stickier. If you step on chewed gum, it will stick to your foot.
Would you find the word electricity on a dictionary page with the following guide words? effort - ember
[ "no", "yes" ]
1
yes or no
grade4
language science
reference-skills
Reference skills
Use guide words
Guide words appear on each page of a dictionary. They tell you the first word and last word on the page. The other words on the page come between the guide words in alphabetical order. To put words in alphabetical order, put them in order by their first letters. If the first letters are the same, look at the second letters. If the second letters are the same, look at the third letters, and so on. If one word is shorter, and there are no more letters to compare, then the shorter word comes first in alphabetical order. For example, be comes before bed.
Put the words in alphabetical order. Since electricity is between the guide words effort - ember, it would be found on that page.
Select the one substance that is not a rock.
[ "Gneiss is formed in nature. It is a solid.", "A turtle shell is made by a living thing. It is formed in nature.", "Trachyte is formed in nature. It is not made by living things." ]
1
closed choice
grade4
natural science
earth-science
Rocks and minerals
Identify rocks using properties
Rocks are made of minerals. Here are some properties of rocks: They are solid. They are formed in nature. They are not made by living things. They are not pure substances.
Compare the properties of each substance to the properties of rocks. Select the substance whose properties do not match those of rocks. Trachyte is a rock. Gneiss is a rock. A turtle shell is made by a living thing. But rocks are not made by living things. So, a turtle shell is not a rock.
What information supports the conclusion that Colin acquired this trait?
[ "Colin has two pet fish. The fish live in a fish tank together.", "Colin was not born knowing how to identify different fish. He had to learn this skill." ]
1
Read the description of a trait. Colin is good at identifying fish.
closed choice
grade3
natural science
biology
Heredity
Inherited and acquired traits: use evidence to support a statement
Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways. Inherited traits are passed down through families. Children gain these traits from their parents. Inherited traits do not need to be learned. Acquired traits are gained during a person's life. Some acquired traits, such as riding a bicycle, are gained by learning. Other acquired traits, such as scars, are caused by the environment.
Which would smell more?
[ "metal hair clip", "perfume" ]
1
closed choice
grade2
natural science
physics
Materials
Compare properties of materials
Every object is made of one or more materials. A material is a type of matter. Wood, glass, metal, and plastic are common materials. A material has different properties. A material's properties tell you how it looks, feels, tastes, or smells.
Smelly is a property. A smelly material has a strong smell. Look at each picture, one at a time. Imagine smelling the material shown in each picture. Of the choices, the perfume would smell more. Perfume has a strong smell.
Which greeting is correct for a letter?
[ "Dear aunt Mia,", "Dear Aunt Mia," ]
1
closed choice
grade2
language science
capitalization
Capitalization
Greetings and closings of letters
A letter starts with a greeting and ends with a closing. For each one, capitalize the first word and end with a comma. You should also capitalize proper nouns, such as Aunt Sue. Dear Aunt Sue, I'm glad you could come to my party, and thank you for the birthday gift. I could not have asked for a better one! Every time I see it, I think of you. With love, Rory
The second greeting is correct: Its first word is capitalized, and it ends with a comma. Aunt Mia is capitalized because it is a proper noun.
Based on this information, what is Bagheera's phenotype for the coat pattern trait?
[ "AA", "a spotted coat" ]
1
In a group of leopards, some individuals have a spotted coat and others have a black coat. In this group, the gene for the coat pattern trait has two alleles. The allele A is for a spotted coat, and the allele a is for a black coat. Bagheera, a leopard from this group, has a spotted coat. Bagheera has two alleles for a spotted coat.
closed choice
grade8
natural science
biology
Genes to traits
Genetics vocabulary: genotype and phenotype
All organisms have pieces of hereditary material called genes, which are passed from parents to offspring. Genes contain instructions for building the parts of an organism. An organism's genes affect its observable traits, including its appearance, its behavior, and which diseases it may have. Genes may have different alleles, or forms, that can cause different versions of a trait. For example, flower color is a trait in pea plants. The gene for this trait has two possible alleles. Each allele is represented by an uppercase or lowercase letter. The allele F is for purple flowers, and the allele f is for white flowers. Each pea plant has two alleles for the flower color gene—one allele inherited from each parent. An organism's genotype for a gene is its combination of alleles for that gene. So, a pea plant may have a genotype of FF, Ff, or ff for the flower color gene. An organism's phenotype for a trait is its observable version of that trait, which depends on the organism's combination of alleles. A pea plant may have a phenotype of purple flowers or white flowers for the flower color trait.
An organism's phenotype for a trait is its observable version of that trait. Bagheera's observable version of the coat pattern trait is a spotted coat. So, Bagheera's phenotype for the coat pattern trait is a spotted coat.
How long is an adult alligator?
[ "15 inches", "15 miles", "15 feet", "15 yards" ]
2
Select the best estimate.
closed choice
grade6
natural science
units-and-measurement
Units and measurement
Choose customary units of distance, mass, and volume
Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means. When you are using customary units, length may be written with units of inches, feet, yards, or miles. There are 12 inches in 1 foot, and 3 feet in 1 yard. There are 5,280 feet in 1 mile. A football is about 1 foot long. A football field is 100 yards long.
The best estimate for the length of an adult alligator is 15 feet. 15 inches is too short. 15 yards and 15 miles are too long.
The city of Princeton has been one of the world's biggest makers of cough drops for many years. But last month, Princeton's cough drop factories were destroyed by floods. What will probably happen to the overall supply of cough drops?
[ "The supply will probably go up.", "The supply will probably go down." ]
1
closed choice
grade4
social science
economics
Supply and demand
Understand overall supply and demand
Overall supply is the total amount of a good or service that producers make and sell. There are several things that can make overall supply go up or down. The table below shows how changes to these things might affect overall supply. | Resources | Number of producers or suppliers | Expected change in demand Supply goes up | when resources cost less or are easier to get | when there are more producers or suppliers | when demand is expected to go up Supply goes down | when resources cost more or are harder to get | when there are fewer producers or suppliers | when demand is expected to go down Producers are people or companies that make goods or provide services. Suppliers are people or companies that sell goods or services. New inventions or technologies can also help workers produce goods and services more quickly. As a result of these changes, the supply of a good or service will often go up.
Floods destroyed the cough drop factories in Princeton. The number of producers of cough drops went down. So, the supply of cough drops will probably go down.
Which closing is correct for a letter?
[ "Best Wishes,\nSandra", "Best wishes,\nSandra" ]
1
closed choice
grade4
language science
punctuation
Formatting
Greetings and closings of letters
A letter starts with a greeting and ends with a closing. For each one, capitalize the first word and end with a comma. You should also capitalize proper nouns, such as Aunt Sue. Dear Aunt Sue, I'm glad you could come to my party, and thank you for the birthday gift. I could not have asked for a better one! Every time I see it, I think of you. With love, Rory
The second closing is correct: Its first word is capitalized, and it ends with a comma.
What is the temperature of the air on a cold, snowy day?
[ "23°F", "23°C" ]
0
Select the better estimate.
closed choice
grade7
natural science
units-and-measurement
Units and measurement
Estimate temperatures
Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means. Temperature can be written with units of degrees Fahrenheit (°F) or Celsius (°C). Use the list below to compare the two units. 212°F | Water boils | 100°C 98.6°F | Body temperature | 37°C 68°F | Room temperature | 20°C 32°F | Water freezes | 0°C
The better estimate for the temperature of the air on a cold, snowy day is 23°F. 23°C is too hot.
Which greeting is correct for a letter?
[ "dear Ms. Perry,", "Dear Ms. Perry," ]
1
closed choice
grade3
language science
punctuation
Formatting
Greetings and closings of letters
A letter starts with a greeting and ends with a closing. For each one, capitalize the first word and end with a comma. You should also capitalize proper nouns, such as Aunt Sue. Dear Aunt Sue, I'm glad you could come to my party, and thank you for the birthday gift. I could not have asked for a better one! Every time I see it, I think of you. With love, Rory
The second greeting is correct: Its first word is capitalized, and it ends with a comma. Ms. Perry is capitalized because it is a proper noun.
What information supports the conclusion that Tucker acquired this trait?
[ "Tucker is most interested in human biology.", "Tucker learned biology by reading, observing, and experimenting." ]
1
Read the description of a trait. Tucker knows a lot about biology.
closed choice
grade4
natural science
biology
Traits and heredity
Inherited and acquired traits: use evidence to support a statement
Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways. Inherited traits are passed down through families. Children gain these traits from their parents. Inherited traits do not need to be learned. Acquired traits are gained during a person's life. Some acquired traits, such as riding a bicycle, are gained by learning. Other acquired traits, such as scars, are caused by the environment.
Which tense does the sentence use? Noah finds old clothes in the attic.
[ "present tense", "future tense", "past tense" ]
0
closed choice
grade5
language science
verbs
Verb tense
Is the sentence in the past, present, or future tense?
Present tense verbs tell you about something that is happening now. Most present-tense verbs are regular. They have no ending, or they end in -s or -es. Two verbs are irregular in the present tense, to be and to have. You must remember their forms. Past tense verbs tell you about something that has already happened. Most past-tense verbs are regular. They end in -ed. Some verbs are irregular in the past tense. You must remember their past-tense forms. Future tense verbs tell you about something that is going to happen. All future-tense verbs use the word will. Present | Past | Future walk, walks | walked | will walk go, goes | went | will go
The sentence is in present tense. You can tell because it uses a present-tense verb, finds. The verb ends in -s and tells you about something that is true or happening now.
What kind of sentence is this? How many articles did Walter write before his publisher offered him a book contract?
[ "interrogative", "imperative", "declarative" ]
0
closed choice
grade8
language science
punctuation
Sentences, fragments, and run-ons
Is the sentence declarative, interrogative, imperative, or exclamatory?
There are four kinds of sentences. A declarative sentence is a statement, and it always ends with a period. The nurse told Mr. Abrams to roll up his sleeve so that she could check his blood pressure. An interrogative sentence is a question, and it always ends with a question mark. Do you have any plans for the upcoming weekend? An imperative sentence is a command. It makes a request or tells someone to do something, and it usually ends with a period. If the command shows strong feeling, it ends with an exclamation point. For this assignment, use references to support your claims. Don't drive so quickly in the construction zone! An exclamatory sentence is like a statement, but it shows surprise or strong feeling. An exclamatory sentence always ends with an exclamation point. I can't wait to travel through Europe this summer!
The sentence asks something, and it ends with a question mark. It is an interrogative sentence.
Which closing is correct for a letter?
[ "Your niece,\nJeanette", "Your Niece,\nJeanette" ]
0
closed choice
grade4
language science
punctuation
Formatting
Greetings and closings of letters
A letter starts with a greeting and ends with a closing. For each one, capitalize the first word and end with a comma. You should also capitalize proper nouns, such as Aunt Sue. Dear Aunt Sue, I'm glad you could come to my party, and thank you for the birthday gift. I could not have asked for a better one! Every time I see it, I think of you. With love, Rory
The first closing is correct: Its first word is capitalized, and it ends with a comma.
Select the one substance that is not a rock.
[ "Conglomerate is a solid. It is formed in nature.", "An antler is made by a living thing. It is not a pure substance.", "Slate is not a pure substance. It is formed in nature." ]
1
closed choice
grade4
natural science
earth-science
Rocks and minerals
Identify rocks using properties
Rocks are made of minerals. Here are some properties of rocks: They are solid. They are formed in nature. They are not made by living things. They are not pure substances.
Compare the properties of each substance to the properties of rocks. Select the substance whose properties do not match those of rocks. An antler is made by a living thing. But rocks are not made by living things. So, an antler is not a rock. Conglomerate is a rock. Slate is a rock.
Which is a complex sentence?
[ "Luke will lend us money for the tickets if we promise to repay him by the end of the year.", "Judith and her sisters drew a map of the United States and hung it on the wall." ]
0
closed choice
grade6
language science
grammar
Sentences, fragments, and run-ons
Is the sentence simple, compound, or complex?
A clause is a group of words that contains both a subject and a predicate. An independent clause is a complete thought. It can stand alone as a sentence. A dependent clause is not a complete thought. It cannot stand alone as a sentence. the oranges on our tree are ripe The clause can stand alone. It is independent. after we pick up Kevin from work The clause cannot stand alone. It is dependent. A simple sentence is made up of a single independent clause. Ben and I spent all day relaxing by the pool. Some simple sentences have introductory phrases, but the introductory phrase is part of the predicate. In the winter, Ben usually wears his heavy coat. Ben usually wears his heavy coat in the winter. A compound sentence is made up of two independent clauses joined by a coordinating conjunction such as and, but, or, or so. We saw a flash of lightning, and seconds later we heard the rumble of thunder. A complex sentence is made up of an independent clause and a dependent clause. The dependent clause usually begins with a subordinating conjunction such as after, although, as, because, before, if, since, unless, until, when, or while. If she ever gets the chance, Terri would love to visit the Egyptian pyramids.
The first sentence is the complex sentence. It is made up of an independent clause and a dependent clause. The dependent clause begins with the subordinating conjunction if. Luke will lend us money for the tickets if we promise to repay him by the end of the year.
What kind of sentence is this? The author finally received recognition for his great work after his children found his old manuscript in the attic and published it.
[ "interrogative", "exclamatory", "declarative" ]
2
closed choice
grade6
language science
punctuation
Sentences, fragments, and run-ons
Is the sentence declarative, interrogative, imperative, or exclamatory?
There are four kinds of sentences. A declarative sentence is a statement, and it always ends with a period. The nurse told Mr. Abrams to roll up his sleeve so that she could check his blood pressure. An interrogative sentence is a question, and it always ends with a question mark. Do you have any plans for the upcoming weekend? An imperative sentence is a command. It makes a request or tells someone to do something, and it usually ends with a period. If the command shows strong feeling, it ends with an exclamation point. For this assignment, use references to support your claims. Don't drive so quickly in the construction zone! An exclamatory sentence is like a statement, but it shows surprise or strong feeling. An exclamatory sentence always ends with an exclamation point. I can't wait to travel through Europe this summer!
The sentence tells about something, and it ends with a period. It is a declarative sentence.
What is the mass of an elephant?
[ "5,325 kilograms", "5,325 grams" ]
0
Select the better estimate.
closed choice
grade4
natural science
units-and-measurement
Units and measurement
Choose metric units of mass
Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means. Mass is a measurement of how much matter something contains. There are many different units of mass. When you are using metric units, mass may be written with units of grams or kilograms. There are 1,000 grams in 1 kilogram. So, 1 gram is much less than 1 kilogram. A paper clip has a mass of about 1 gram, while a textbook has a mass of about 1 kilogram.
The better estimate for the mass of an elephant is 5,325 kilograms. 5,325 grams is too light.
Eli Whitney invented the cotton gin in 1793. The cotton gin is a machine that makes it easier to harvest cotton quickly. What happened to the overall supply of cotton after 1793?
[ "The supply went up.", "The supply went down." ]
0
closed choice
grade7
social science
economics
Supply and demand
Understand overall supply and demand
Overall supply is the total amount of a good or service that producers make and sell. There are several things that can make overall supply go up or down. The table below shows how changes to these things might affect overall supply. | Resources | Number of producers or suppliers | Expected change in demand Supply goes up | when resources cost less or are easier to get | when there are more producers or suppliers | when demand is expected to go up Supply goes down | when resources cost more or are harder to get | when there are fewer producers or suppliers | when demand is expected to go down Producers are people or companies that make goods or provide services. Suppliers are people or companies that sell goods or services. New inventions or technologies can also help workers produce goods and services more quickly. As a result of these changes, the supply of a good or service will often go up.
The cotton gin was a new technology that made it possible to harvest cotton much faster than before. Cotton growers were able to produce much more cotton in the same amount of time. So, the supply of cotton went up.
Which word would you find on a dictionary page with the following guide words? ill - inspector
[ "is", "impose" ]
1
closed choice
grade7
language science
reference-skills
Reference skills
Use guide words
Guide words appear on each page of a dictionary. They tell you the first word and last word on the page. The other words on the page come between the guide words in alphabetical order. To put words in alphabetical order, put them in order by their first letters. If the first letters are the same, look at the second letters. If the second letters are the same, look at the third letters, and so on. If one word is shorter, and there are no more letters to compare, then the shorter word comes first in alphabetical order. For example, be comes before bed.
Put the words in alphabetical order. Since impose is between the guide words ill - inspector, it would be found on that page.
Complete the sentence. Rain forming in a cloud is a ().
[ "physical change", "chemical change" ]
0
closed choice
grade5
natural science
chemistry
Physical and chemical change
Compare physical and chemical changes
Matter is made of very small particles called atoms. Atoms can be linked together by chemical bonds. When two or more atoms link together, they form a molecule. In a chemical change, the chemical bonds in the molecules break. The atoms then link together to form new molecules. The types of molecules in matter before and after a chemical change are always different. Burning a piece of paper is a chemical change. As paper burns, paper molecules react with oxygen molecules in the air. This reaction breaks the chemical bonds in the molecules. The atoms then relink and form different molecules. For example, carbon dioxide molecules are created when paper burns. In a physical change, chemical bonds do not break. The types of molecules in matter before and after a physical change are always the same. A change of state is a type of physical change. For example, water vaporizing is a physical change. Liquid water and water vapor are made of the same type of matter: water.
Rain forming in a cloud is a change of state. So, it is a physical change. Water vapor in the air condenses into tiny droplets of liquid water. These droplets make up a cloud. When there is enough water in the air, the droplets will fall as rain.
What is the source of the allusion in the sentence below? Ronald persisted despite his friends' attempts to tell him that this was a Gordian knot.
[ "U.S. history", "ancient legend" ]
1
closed choice
grade12
language science
figurative-language
Literary devices
Recall the source of an allusion
An allusion is a brief mention of something or someone well known, often from mythology, history, or literature. An allusion lets you reference ideas from an entire story in just a few words. The protean nature of the disease makes it difficult to diagnose. The word protean is an allusion to the sea god Proteus in Greek mythology. Because the sea is constantly changing, to describe something as protean suggests that it is variable or in flux.
The source of the allusion Gordian knot is ancient legend. According to legend, Alexander the Great used his sword to slash an intricate knot by which a chariot was tied to a pole in the city of Gordium. The allusion Gordian knot means a highly complex problem.
Is the following trait inherited or acquired? Gavin has a scar on his right ankle.
[ "inherited", "acquired" ]
1
Hint: Most scars are caused by accidents during a person's life.
closed choice
grade3
natural science
biology
Heredity
Identify inherited and acquired traits
Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways. Inherited traits are passed down through families. Children gain these traits from their parents. Inherited traits do not need to be learned. Acquired traits are gained during a person's life. Some acquired traits, such as riding a bicycle, are gained by learning. Other acquired traits, such as scars, are caused by the environment. Children do not inherit their parents' acquired traits.
Children do not inherit their parent's scars. Instead, scars are caused by the environment. People can get scars after they get hurt. So, having a scar is an acquired trait.
According to Newton's third law, what other force must be happening?
[ "The suitcase is pushing on Kenneth.", "The suitcase is pulling on Kenneth." ]
1
Isaac Newton was born in the 1600s and studied how objects move. He discovered three fundamental laws about forces and motion. According to Newton's third law, for every force, there is an equal and opposite force. Consider the following force: Kenneth is pulling on a full suitcase.
closed choice
grade6
natural science
physics
Velocity, acceleration, and forces
Predict forces using Newton's third law
According to Newton's third law, for every force, there is an equal and opposite force. This means that if one object is applying a force on a second object, the second object must also be applying a force on the first object, but in the opposite direction. For example, if your hand is pushing down on a table, the table is also pushing up on your hand. Or, if you are pulling forward on a rope, the rope is also pulling back on you.
Kenneth is pulling on the suitcase. So, Newton's third law tells you that the suitcase is pulling on Kenneth.
What information supports the conclusion that Hansen acquired this trait?
[ "Hansen's scar was caused by an accident. He cut his arm when he fell off his bicycle.", "Some scars fade more quickly than others." ]
0
Read the description of a trait. Hansen has a scar on his right arm.
closed choice
grade5
natural science
biology
Traits and heredity
Inherited and acquired traits: use evidence to support a statement
Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways. Inherited traits are passed down through families. Children gain these traits from their parents. Inherited traits do not need to be learned. Acquired traits are gained during a person's life. Some acquired traits, such as riding a bicycle, are gained by learning. Other acquired traits, such as scars, are caused by the environment.
Using only these supplies, which question can Bridgette investigate with an experiment?
[ "Does the basketball bounce higher on a lawn or on a dirt path?", "Does the basketball bounce higher on gravel or on grass?", "Do larger basketballs bounce higher than smaller basketballs on a brick patio?" ]
1
Bridgette gets a basketball for her birthday and dribbles it around her neighborhood. She notices that sometimes the ball bounces higher than other times. She wonders what factors affect how high her ball bounces. So, she decides to design an experiment. She has the following supplies available: one basketball access to a brick patio access to a grassy lawn access to a gravel driveway a meterstick
closed choice
grade7
natural science
science-and-engineering-practices
Designing experiments
Identify questions that can be investigated with a set of materials
Experiments can be designed to answer specific questions. When designing an experiment, you must identify the supplies that are necessary to answer your question. In order to do this, you need to figure out what will be tested and what will be measured during the experiment. Imagine that you are wondering if plants grow to different heights when planted in different types of soil. How might you decide what supplies are necessary to conduct this experiment? First, you need to identify the part of the experiment that will be tested, which is the independent variable. This is usually the part of the experiment that is different or changed. In this case, you would like to know how plants grow in different types of soil. So, you must have different types of soil available. Next, you need to identify the part of the experiment that will be measured or observed, which is the dependent variable. In this experiment, you would like to know if some plants grow taller than others. So, you must be able to compare the plants' heights. To do this, you can observe which plants are taller by looking at them, or you can measure their exact heights with a meterstick. So, if you have different types of soil and can observe or measure the heights of your plants, then you have the supplies you need to investigate your question with an experiment!
Which text uses the word disinterested in its traditional sense?
[ "Trudy is excellent in her position as class treasurer. She always manages to be disinterested in student council debates about the allocation of extracurricular funds.", "Trudy is happy with her position as class treasurer. Though she would have the support of the student council, she is disinterested in running for student body president." ]
0
closed choice
grade9
language science
writing-strategies
Word usage and nuance
Explore words with new or contested usages
Words change in meaning when speakers begin using them in new ways. For example, the word peruse once only meant to examine in detail, but it's now also commonly used to mean to look through in a casual manner. When a word changes in meaning, its correct usage is often debated. Although a newer sense of the word may be more commonly used, many people consider a word's traditional definition to be the correct usage. Being able to distinguish the different uses of a word can help you use it appropriately for different audiences. Britney perused her notes, carefully preparing for her exam. The traditional usage above is considered more standard. David perused the magazine, absentmindedly flipping through the pages. The nontraditional usage above is now commonly used, but traditional style guides generally advise against it.
The first text uses disinterested in its traditional sense: unbiased or impartial. Trudy is excellent in her position as class treasurer. She always manages to be disinterested in student council debates about the allocation of extracurricular funds. The second text uses disinterested in its nontraditional sense: uninterested or indifferent. Trudy is happy with her position as class treasurer. Though she would have the support of the student council, she is disinterested in running for student body president. Most style guides recommend to use the traditional sense of the word disinterested because it is considered more standard.
Based on this information, what is this fruit fly's phenotype for the body color trait?
[ "a black body", "bb" ]
0
In a group of fruit flies, some individuals have a gray body and others have a black body. In this group, the gene for the body color trait has two alleles. The allele B is for a gray body, and the allele b is for a black body. A certain fruit fly from this group has a black body. This fly has two alleles for a black body.
closed choice
grade8
natural science
biology
Genes to traits
Genetics vocabulary: genotype and phenotype
All organisms have pieces of hereditary material called genes, which are passed from parents to offspring. Genes contain instructions for building the parts of an organism. An organism's genes affect its observable traits, including its appearance, its behavior, and which diseases it may have. Genes may have different alleles, or forms, that can cause different versions of a trait. For example, flower color is a trait in pea plants. The gene for this trait has two possible alleles. Each allele is represented by an uppercase or lowercase letter. The allele F is for purple flowers, and the allele f is for white flowers. Each pea plant has two alleles for the flower color gene—one allele inherited from each parent. An organism's genotype for a gene is its combination of alleles for that gene. So, a pea plant may have a genotype of FF, Ff, or ff for the flower color gene. An organism's phenotype for a trait is its observable version of that trait, which depends on the organism's combination of alleles. A pea plant may have a phenotype of purple flowers or white flowers for the flower color trait.
An organism's phenotype for a trait is its observable version of that trait. The fruit fly's observable version of the body color trait is a black body. So, the fly's phenotype for the body color trait is a black body.
Is the following trait inherited or acquired? Kaylee is good at knitting scarves.
[ "acquired", "inherited" ]
0
Hint: People who can knit had to learn how to do it.
closed choice
grade4
natural science
biology
Traits and heredity
Identify inherited and acquired traits
Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways. Inherited traits are passed down through families. Children gain these traits from their parents. Inherited traits do not need to be learned. Acquired traits are gained during a person's life. Some acquired traits, such as riding a bicycle, are gained by learning. Other acquired traits, such as scars, are caused by the environment. Children do not inherit their parents' acquired traits.
People are not born knowing how to knit. Instead, many people learn how to knit. Knitting well takes practice. So, knitting well is an acquired trait.
Which figure of speech is used in this text? "This mattress is as soft as concrete," Luke complained as he tested the bed in his hotel room.
[ "pun", "verbal irony" ]
1
closed choice
grade10
language science
figurative-language
Literary devices
Classify figures of speech: review
Figures of speech are words or phrases that use language in a nonliteral or unusual way. They can make writing more expressive. Alliteration is the repetition of sounds at the beginning of nearby words. What a lucky little lady you are! An allusion is a brief reference to something or someone well known, often from history or literature. "I'd better get home before I turn into a pumpkin!" Lila remarked. An idiom is an expression that cannot be understood literally. Its meaning must be learned. The assignment was a piece of cake. A simile uses like or as to compare two things that are not actually alike. The cat's fur was as dark as the night. A metaphor compares two things that are not actually alike without using like or as. The snow formed a blanket over the town. Onomatopoeia involves using a word that expresses a sound. The scrambled eggs hit the floor with a splat. Personification is giving human characteristics to nonhuman things. The trees danced in the wind. A pun involves using a word or phrase in a humorous way that suggests more than one meaning. A great new broom is sweeping the nation. Verbal irony involves saying one thing but implying something very different. People often use verbal irony when they are being sarcastic. Olivia seems thrilled that her car keeps breaking down. Each breakdown is as enjoyable as a punch to the face.
The text uses verbal irony, which involves saying one thing but implying something very different. As soft as concrete shows verbal irony because concrete is not soft.
Based on this information, what is this pea plant's genotype for the pea color gene?
[ "ee", "green peas" ]
0
In a group of pea plants, some individuals have yellow peas and others have green peas. In this group, the gene for the pea color trait has two alleles. The allele E is for yellow peas, and the allele e is for green peas. A certain pea plant from this group has green peas. This plant has two alleles for green peas.
closed choice
grade6
natural science
biology
Genes to traits
Genetics vocabulary: genotype and phenotype
All organisms have pieces of hereditary material called genes, which are passed from parents to offspring. Genes contain instructions for building the parts of an organism. An organism's genes affect its observable traits, including its appearance, its behavior, and which diseases it may have. Genes may have different alleles, or forms, that can cause different versions of a trait. For example, flower color is a trait in pea plants. The gene for this trait has two possible alleles. Each allele is represented by an uppercase or lowercase letter. The allele F is for purple flowers, and the allele f is for white flowers. Each pea plant has two alleles for the flower color gene—one allele inherited from each parent. An organism's genotype for a gene is its combination of alleles for that gene. So, a pea plant may have a genotype of FF, Ff, or ff for the flower color gene. An organism's phenotype for a trait is its observable version of that trait, which depends on the organism's combination of alleles. A pea plant may have a phenotype of purple flowers or white flowers for the flower color trait.
An organism's genotype for a gene is its combination of alleles for that gene. The pea plant has two alleles for green peas (e). So, the plant's genotype for the pea color gene is ee.
Does this passage describe the weather or the climate? Shawna noticed that the wind was blowing in from the ocean this afternoon.
[ "climate", "weather" ]
1
Hint: Weather is what the atmosphere is like at a certain place and time. Climate is the pattern of weather in a certain place.
closed choice
grade4
natural science
earth-science
Weather and climate
What's the difference between weather and climate?
The atmosphere is the layer of air that surrounds Earth. Both weather and climate tell you about the atmosphere. Weather is what the atmosphere is like at a certain place and time. Weather can change quickly. For example, the temperature outside your house might get higher throughout the day. Climate is the pattern of weather in a certain place. For example, summer temperatures in New York are usually higher than winter temperatures.
Read the text carefully. Shawna noticed that the wind was blowing in from the ocean this afternoon. This passage tells you about the wind direction where Shawna was this afternoon. It describes the atmosphere at a certain place and time. So, this passage describes the weather.
Select the one animal that has all of the reptile traits listed above.
[ "Cardinalfish have scaly skin and live near coral reefs. Cardinalfish lay eggs with no shells and have fins that help them swim underwater.", "American crocodiles often live where rivers flow into the ocean. In these places, the fresh water and salt water mix. This mixing creates the somewhat salty, or brackish, water that these crocodiles prefer. American crocodiles have scaly, waterproof skin and hatch from eggs with shells." ]
1
Reptiles are a group of animals with similar traits. The following traits can be used to identify reptiles: They have scaly, waterproof skin. They make eggs with shells. Observe the animals and read the descriptions.
closed choice
grade5
natural science
biology
Classification
Use evidence to classify mammals, birds, fish, reptiles, and amphibians
Scientists sort animals with similar traits into groups. This is called classification. Classification helps scientists learn about how animals live. How do scientists classify animals? First, they make observations about an animal. Scientists observe the animal's traits, including its body parts and behavior. Then, scientists compare the animal's traits to other animals' traits. Scientists classify animals with similar traits into a group.
To decide if an animal is part of a group, look at the traits of the group. Reptiles have the following traits: They have scaly, waterproof skin. They make eggs with shells. Compare each animal's traits to the group's traits. Select the animal with traits similar to the group's traits. An American crocodile has the following traits: It has scaly, waterproof skin. It makes eggs with shells. An American crocodile has the traits of a reptile. An American crocodile is a reptile. A cardinalfish has the following traits: It has fins, not limbs. It makes eggs with no shells. A cardinalfish does not have all of the traits of a reptile. A cardinalfish is a fish.
Select the amphibian.
[ "fire salamander", "gharial", "green moray eel", "whale shark" ]
0
closed choice
grade5
natural science
biology
Classification
Identify mammals, birds, fish, reptiles, and amphibians
Amphibians have moist skin and begin their lives in water.
A green moray eel is a fish. It lives underwater. It has fins, not limbs. Eels are long and thin. They may have small fins. They look like snakes, but they are fish! A whale shark is a fish. It lives underwater. It has fins, not limbs. Whale sharks are the largest fish in the world! Adult whale sharks can weigh over 21 tons—as much as seven elephants! A fire salamander is an amphibian. It has moist skin and begins its life in water. Fire salamanders can release poison from their skin. This poison helps protect them from predators. A gharial is a reptile. It has scaly, waterproof skin. Gharials are a type of crocodile. Gharials live near rivers and eat fish.
Which object has more thermal energy?
[ "a 300-gram rock at a temperature of 120°F", "a 300-gram rock at a temperature of 175°F" ]
1
The objects are identical except for their temperatures.
closed choice
grade3
natural science
physics
Heat and thermal energy
How is temperature related to thermal energy?
All solids, liquids, and gases are made of matter. Matter is made up of tiny particles that are always moving. The energy from the motion of these particles is called thermal energy. Temperature measures how hot or cold matter is. If the particles in matter move faster, the temperature goes up. The matter now has both more thermal energy and a higher temperature.
The two rocks have the same mass but different temperatures. Since the 175°F rock is hotter than the 120°F rock, it has more thermal energy.
Which tense does the sentence use? Myra will play the guitar after dinner.
[ "past tense", "future tense", "present tense" ]
1
closed choice
grade5
language science
verbs
Verb tense
Is the sentence in the past, present, or future tense?
Present tense verbs tell you about something that is happening now. Most present-tense verbs are regular. They have no ending, or they end in -s or -es. Two verbs are irregular in the present tense, to be and to have. You must remember their forms. Past tense verbs tell you about something that has already happened. Most past-tense verbs are regular. They end in -ed. Some verbs are irregular in the past tense. You must remember their past-tense forms. Future tense verbs tell you about something that is going to happen. All future-tense verbs use the word will. Present | Past | Future walk, walks | walked | will walk go, goes | went | will go
The sentence is in future tense. You can tell because it uses will before the main verb, play. The verb tells you about something that is going to happen.
Which would stretch the most?
[ "bone", "wool scarf", "glass bottle" ]
1
closed choice
grade4
natural science
physics
Materials
Compare properties of materials
Every object is made of one or more materials. A material is a type of matter. Wood, glass, metal, and plastic are common materials. A material has different properties. A material's properties tell you how it looks, feels, tastes, or smells. Some examples of properties are shiny, hard, fragile, and stretchy. For example, a shiny material reflects a lot of light. A fragile material breaks when you drop it.
Stretchy is a property. A stretchy material gets longer when you pull on it. Look at each picture, one at a time. Imagine pulling on the material shown in each picture. Of the choices, the wool scarf would stretch the most. If you pull the ends of a wool scarf, it will get longer.
Select the animal.
[ "Oak trees can have thick branches.", "Cherry trees can grow white or pink flowers.", "Yellow jackets drink nectar and fruit.", "Daffodils have a green stem." ]
2
closed choice
grade3
natural science
biology
Classification
Identify plants and animals
Plants and animals are living things. Living things are called organisms. Plants come in many shapes and sizes. Most plants grow in the ground. They might grow leaves, flowers, and fruit. Plants cannot move around on their own like animals can. Animals also come in many shapes and sizes. Most animals can move around. Animals might run, swim, jump, or fly. Animals eat plants or other organisms for food.
An oak tree is a plant. It can have thick branches. Acorns grow on oak trees. Acorns are small nuts with a seed inside. A yellow jacket is an animal. It drinks nectar and eats fruit. A yellow jacket is an insect. Yellow jackets have two wings. A cherry tree is a plant. It can grow white or pink flowers. Many types of cherry trees come from Japan. Some of these trees have flowers, but no cherries! A daffodil is a plant. It has a green stem. Most daffodil plants grow a single flower.
Which tense does the sentence use? Tony carefully spelled the word aloud.
[ "present tense", "past tense", "future tense" ]
1
closed choice
grade4
language science
verbs
Verb tense
Is the sentence in the past, present, or future tense?
Present tense verbs tell you about something that is happening now. Most present-tense verbs are regular. They have no ending, or they end in -s or -es. Two verbs are irregular in the present tense, to be and to have. You must remember their forms. Past tense verbs tell you about something that has already happened. Most past-tense verbs are regular. They end in -ed. Some verbs are irregular in the past tense. You must remember their past-tense forms. Future tense verbs tell you about something that is going to happen. All future-tense verbs use the word will. Present | Past | Future walk, walks | walked | will walk go, goes | went | will go
The sentence is in past tense. You can tell because it uses a past-tense verb, spelled. The verb ends in -ed and tells you about something that has already happened.
Compare the motion of three bicycles. Which bicycle was moving at the highest speed?
[ "a bicycle that moved 35miles east in 5hours", "a bicycle that moved 70miles north in 5hours", "a bicycle that moved 135miles north in 5hours" ]
2
closed choice
grade3
natural science
physics
Force and motion
Compare the speeds of moving objects
An object's speed tells you how fast the object is moving. Speed depends on both distance and time. Distance tells you how far the object has moved. One unit used to measure distance is the mile. Time tells you how long the object has spent moving. One unit used to measure time is the hour. Think about objects moving for the same amount of time. The object that is moving the fastest will go the farthest distance in that time. It is moving at the highest speed.
Look at the distance each bicycle moved and the time it took to move that distance. The direction each bicycle moved does not affect its speed. Notice that each bicycle moved for 5 hours. The bicycle that moved 135 miles moved the farthest distance in that time. So, that bicycle must have moved at the highest speed.
What is the temperature of an ice cream sandwich?
[ "37°C", "37°F" ]
1
Select the better estimate.
closed choice
grade7
natural science
units-and-measurement
Units and measurement
Estimate temperatures
Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means. Temperature can be written with units of degrees Fahrenheit (°F) or Celsius (°C). Use the list below to compare the two units. 212°F | Water boils | 100°C 98.6°F | Body temperature | 37°C 68°F | Room temperature | 20°C 32°F | Water freezes | 0°C
The better estimate for the temperature of an ice cream sandwich is 37°F. 37°C is too hot.
What information supports the conclusion that Farid inherited this trait?
[ "Farid's biological parents have wavy hair.", "Farid's biological mother has long hair. Farid also has long hair.", "Farid uses a headband to keep his wavy hair out of his face." ]
0
Read the description of a trait. Farid has wavy hair.
closed choice
grade7
natural science
biology
Genes to traits
Inherited and acquired traits: use evidence to support a statement
Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways. Inherited traits are passed down from biological parents to their offspring through genes. Genes are pieces of hereditary material that contain the instructions that affect inherited traits. Offspring receive their genes, and therefore gain their inherited traits, from their biological parents. Inherited traits do not need to be learned. Acquired traits are gained during a person's life. Some acquired traits, such as riding a bicycle, are gained by learning. Other acquired traits, such as scars, are caused by the environment. Parents do not pass acquired traits down to their offspring.
Which figure of speech is used in this text? Five years have passed; Five summers, with the length of Five long winters! And again I hear these waters . . . —William Wordsworth, "Tintern Abbey"
[ "anaphora", "euphemism" ]
0
closed choice
grade11
language science
figurative-language
Literary devices
Classify the figure of speech: review
Figures of speech are words or phrases that use language in a nonliteral or unusual way. They can make writing more expressive. Anaphora is the repetition of the same word or words at the beginning of several phrases or clauses. We are united. We are powerful. We are winners. Antithesis involves contrasting opposing ideas within a parallel grammatical structure. I want to help, not to hurt. Apostrophe is a direct address to an absent person or a nonhuman entity. Oh, little bird, what makes you sing so beautifully? Assonance is the repetition of a vowel sound in a series of nearby words. Try to light the fire. Chiasmus is an expression in which the second half parallels the first but reverses the order of words. Never let a fool kiss you or a kiss fool you. A euphemism is a polite or indirect expression that is used to de-emphasize an unpleasant topic. The head of Human Resources would never refer to firing people, only to laying them off. Hyperbole is an obvious exaggeration that is not meant to be taken literally. I ate so much that I think I might explode! An oxymoron is a joining of two seemingly contradictory terms. Some reviewers are calling this book a new classic. A paradox is a statement that might at first appear to be contradictory, but that may in fact contain some truth. Always expect the unexpected. Understatement involves deliberately representing something as less serious or important than it really is. As you know, it can get a little cold in the Antarctic.
The text uses anaphora, the repetition of the same word or words at the beginning of several phrases or clauses. Wordsworth repeats the word five at the beginning of each line.
What is the volume of a kitchen sink?
[ "30 liters", "30 milliliters" ]
0
Select the better estimate.
closed choice
grade4
natural science
units-and-measurement
Units and measurement
Choose metric units of volume
Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means. Volume is a measurement of how much space something takes up. There are many different units of volume. When you are using metric units, volume may be written in units of milliliters or liters. There are 1,000 milliliters in 1 liter. So, 1 milliliter is much less than 1 liter. A raindrop has a volume of about 20 milliliters, while a large soda bottle has a volume of 2 liters. The flask shown here measures volumes up to 500 milliliters.
The better estimate for the volume of a kitchen sink is 30 liters. 30 milliliters is too little.
Complete the statement. Assume that the water balloon's mass did not change. The gravitational potential energy stored between the water balloon and Earth () as the water balloon fell toward John.
[ "stayed the same", "increased", "decreased" ]
2
Read the text about an object in motion. Christine dropped a water balloon off a balcony. The water balloon fell toward her friend John, who was standing below the balcony.
closed choice
grade7
natural science
physics
Kinetic and potential energy
Identify changes in gravitational potential energy
Gravitational potential energy is stored between any two objects. So, for every object on or near Earth, there is gravitational potential energy stored between the object and Earth. The amount of gravitational potential energy stored between an object and Earth depends on the mass of the object. The amount of gravitational potential energy also depends on the distance between the object and the center of Earth. This distance increases when the object moves higher and decreases when the object moves lower. If the distance between an object and the center of Earth changes, the gravitational potential energy stored between the object and Earth will change. The table below shows how this change can happen. When an object's mass stays the same and its distance from the center of Earth... | Gravitational potential energy stored between the object and Earth... increases | increases decreases | decreases stays the same | stays the same
Think about how the distance between the water balloon and the center of Earth changed. John was lower than the balcony. As the water balloon fell toward John, the distance between the water balloon and the center of Earth decreased. So, the gravitational potential energy stored between the water balloon and Earth decreased as the water balloon fell toward John.
Based on this information, what is this rose plant's genotype for the flower color gene?
[ "dark yellow flowers", "ff" ]
1
In a group of rose plants, some individuals have light yellow flowers and others have dark yellow flowers. In this group, the gene for the flower color trait has two alleles. The allele F is for light yellow flowers, and the allele f is for dark yellow flowers. A certain rose plant from this group has dark yellow flowers. This plant has two alleles for dark yellow flowers.
closed choice
grade6
natural science
biology
Genes to traits
Genetics vocabulary: genotype and phenotype
All organisms have pieces of hereditary material called genes, which are passed from parents to offspring. Genes contain instructions for building the parts of an organism. An organism's genes affect its observable traits, including its appearance, its behavior, and which diseases it may have. Genes may have different alleles, or forms, that can cause different versions of a trait. For example, flower color is a trait in pea plants. The gene for this trait has two possible alleles. Each allele is represented by an uppercase or lowercase letter. The allele F is for purple flowers, and the allele f is for white flowers. Each pea plant has two alleles for the flower color gene—one allele inherited from each parent. An organism's genotype for a gene is its combination of alleles for that gene. So, a pea plant may have a genotype of FF, Ff, or ff for the flower color gene. An organism's phenotype for a trait is its observable version of that trait, which depends on the organism's combination of alleles. A pea plant may have a phenotype of purple flowers or white flowers for the flower color trait.
An organism's genotype for a gene is its combination of alleles for that gene. The rose plant has two alleles for dark yellow flowers (f). So, the plant's genotype for the flower color gene is ff.
Which object has more thermal energy?
[ "a 7-kilogram block of steel at a temperature of 160°F", "a 7-kilogram block of steel at a temperature of 235°F" ]
1
The objects are identical except for their temperatures.
closed choice
grade3
natural science
physics
Heat and thermal energy
How is temperature related to thermal energy?
All solids, liquids, and gases are made of matter. Matter is made up of tiny particles that are always moving. The energy from the motion of these particles is called thermal energy. Temperature measures how hot or cold matter is. If the particles in matter move faster, the temperature goes up. The matter now has both more thermal energy and a higher temperature.
The two blocks of steel have the same mass but different temperatures. Since the 235°F block is hotter than the 160°F block, it has more thermal energy.
Is teaching school a good or a service?
[ "a service", "a good" ]
0
closed choice
grade2
social science
economics
Economics
Goods and services
Everything you can buy is either a good or a service. A good is something you can touch or hold in your hands. For example, a hammer is a good. A service is a job you pay someone else to do. For example, cooking food in a restaurant is a service.
To decide whether teaching school is a good or a service, ask these questions: Is teaching school something you can touch? No. Is teaching school a job you might pay someone else to do? Yes. So, teaching school is a service.
Compare the motion of two runners. Which runner was moving at a lower speed?
[ "a runner who moved 35miles in 5hours", "a runner who moved 25miles in 5hours" ]
1
closed choice
grade2
natural science
physics
Force and motion
Compare the speeds of moving objects
An object's speed tells you how fast the object is moving. Speed depends on both distance and time. Distance tells you how far the object has moved. One unit used to measure distance is the mile. Time tells you how long the object has spent moving. One unit used to measure time is the hour. Think about two objects moving for the same amount of time. The object that is moving slower will go a shorter distance in that time. It is moving at a lower speed.
Look at the distance each runner moved and the time it took to move that distance. One runner moved 25 miles in 5 hours. The other runner moved 35 miles in 5 hours. Notice that each runner spent the same amount of time moving. The runner who moved 25 miles moved a shorter distance in that time. So, that runner must have moved at a lower speed.
What do these two changes have in common? water boiling on a stove a puddle freezing into ice on a cold night
[ "Both are caused by cooling.", "Both are only physical changes.", "Both are chemical changes.", "Both are caused by heating." ]
1
closed choice
grade3
natural science
chemistry
Physical and chemical change
Compare physical and chemical changes
Chemical changes and physical changes are two common ways matter can change. In a chemical change, the type of matter changes. The types of matter before and after a chemical change are always different. Some chemical changes are caused by heating or cooling. For example, burning a piece of paper is a chemical change caused by heating. When paper gets hot enough, it re­acts with oxygen in the air and burns. The paper and oxygen change into ash and smoke. In a physical change, the type of matter stays the same. The types of matter before and after a physical change are always the same. A change of state is a type of physical change. Changes of state can be caused by heating or cooling. For example, ice melting is a physical change that can be caused by heating. Ice and liquid water are made of the same type of matter: water. The law of conservation of mass says that all physical and chemical changes conserve mass. Conserve means to keep the same. So, the total mass before a physical or chemical change is equal to the total mass after the change.
Step 1: Think about each change. Water boiling on the stove is a change of state. So, it is a physical change. The liquid changes into a gas, but a different type of matter is not formed. A puddle freezing into ice on a cold night is a change of state. So, it is a physical change. Liquid water freezes and becomes solid, but it is still made of water. A different type of matter is not formed. Step 2: Look at each answer choice. Both are only physical changes. Both changes are physical changes. No new matter is created. Both are chemical changes. Both changes are physical changes. They are not chemical changes. Both are caused by heating. Water boiling is caused by heating. But a puddle freezing is not. Both are caused by cooling. A puddle freezing is caused by cooling. But water boiling is not.
Which logical fallacy is used in the text? The school requires us to be on time. If you can't even obey this rule, then what's to stop you from doing something worse, like stealing?
[ "slippery slope fallacy: the false assumption that a small first step will lead to extreme consequences", "appeal to nature: the assumption that natural things are always good", "bandwagon fallacy: the assumption that the popular choice is automatically correct" ]
0
closed choice
grade10
language science
writing-strategies
Developing and supporting arguments
Classify logical fallacies
A strong argument uses valid reasoning and logic in support of a claim. When an argument or claim introduces irrelevant information or misrepresents the issues at hand, it may be committing a logical fallacy. Logical fallacies can hurt a writer's credibility and can lead readers to draw false conclusions. A logical fallacy may present irrelevant information: Fallacy | Description ad hominem | an attack against the person making the argument, rather than the argument itself appeal to nature | an argument that assumes the natural choice is always the best choice bandwagon fallacy | an argument that assumes the popular choice is always the best choice circular reasoning | an argument that supports a claim with the claim itself guilt by association | an unfair negative association with another person or group that is intended to discredit someone or something A logical fallacy may misrepresent the issues at hand: Fallacy | Description false causation | the assumption that because two things happened together, one caused the other false dichotomy | an argument that presents only two choices when more options exist hasty generalization | a broad claim based on too few observations slippery slope fallacy | the false assumption that a small first step will necessarily lead to extreme consequences straw man | a misrepresentation of an opponent's position that makes it easier to argue against
The text argues that being late to school will lead to becoming a thief. However, this argument wrongly suggests that the inability to follow a rule about being on time to school will necessarily lead to the breaking of other rules. This illustrates a type of logical fallacy known as the slippery slope fallacy.
What kind of sentence is this? She has a huge collection of marbles.
[ "declarative", "interrogative" ]
0
closed choice
grade4
language science
punctuation
Sentences, fragments, and run-ons
Is the sentence declarative, interrogative, imperative, or exclamatory?
There are four kinds of sentences. A declarative sentence is a statement. It tells about something. A declarative sentence always ends with a period. I have an older brother and a younger sister. An interrogative sentence is a question. It asks something. An interrogative sentence always ends with a question mark. How tall are you? An imperative sentence is a command. It makes a request or tells someone to do something. An imperative sentence usually ends with a period. If the command shows strong feeling, it ends with an exclamation point. Read the first chapter by next week. Look out for that car! An exclamatory sentence is like a statement, but it shows surprise or strong feeling. An exclamatory sentence always ends with an exclamation point. Some whales are over ninety feet long! I can't wait until tomorrow!
The sentence tells about something, and it ends with a period. It is a declarative sentence.
What is the source of the allusion in the sentence below? When I learned the details of Sophia's Faustian bargain, I was in disbelief.
[ "literature", "Roman mythology" ]
0
closed choice
grade11
language science
figurative-language
Literary devices
Recall the source of an allusion
An allusion is a brief mention of something or someone well known, often from mythology, history, or literature. An allusion lets you reference ideas from an entire story in just a few words. The protean nature of the disease makes it difficult to diagnose. The word protean is an allusion to the sea god Proteus in Greek mythology. Because the sea is constantly changing, to describe something as protean suggests that it is variable or in flux.
The source of the allusion Faustian bargain is literature. In a play by Christopher Marlowe based on the legend of Faust, a man strikes a deal with the devil. Disregarding the long-term consequences of his actions, he sells his soul in exchange for power. The allusion Faustian bargain means a compromise of one's values for personal gain.
Which correctly shows the title of a movie?
[ "The Red Balloon", "the Red Balloon" ]
0
closed choice
grade4
language science
capitalization
Formatting
Capitalizing titles
In a title, capitalize the first word, the last word, and every important word in between. The Wind in the Willows James and the Giant Peach These words are not important in titles: Articles, a, an, the Short prepositions, such as at, by, for, in, of, on, to, up Coordinating conjunctions, such as and, but, or
Capitalize the first word, the last word, and every important word in between. The correct title is The Red Balloon.
Based on this information, what is Rollo's phenotype for the whisker type trait?
[ "straight whiskers", "curved whiskers" ]
0
In a group of Syrian hamsters, some individuals have straight whiskers and others have curved whiskers. In this group, the gene for the whisker type trait has two alleles. The allele for straight whiskers (H) is dominant over the allele for curved whiskers (h). Rollo is a Syrian hamster from this group. Rollo has the heterozygous genotype Hh for the whisker type gene.
closed choice
grade7
natural science
biology
Genes to traits
Genetics vocabulary: dominant and recessive
All organisms have pieces of hereditary material called genes, which are passed from parents to offspring. Genes contain instructions for building the parts of an organism. An organism's genes affect its observable traits, including its appearance, its behavior, and which diseases it may have. Genes may have different alleles, or forms, that can cause different versions of a trait. For example, flower color is a trait in pea plants. The gene for this trait has two possible alleles. Each allele is represented by an uppercase or lowercase letter. The allele F is for purple flowers, and the allele f is for white flowers. Each pea plant has two alleles for the flower color gene—one allele inherited from each parent. An organism's genotype for a gene is its combination of alleles for that gene. So, a pea plant may have a genotype of FF, Ff, or ff for the flower color gene. An organism's phenotype for a trait is its observable version of that trait, which depends on the organism's combination of alleles. A pea plant may have a phenotype of purple flowers or white flowers for the flower color trait. Some traits, like flower color in pea plants, are controlled by a single gene. Most plants and animals have a genotype made up of two alleles for these traits. These two alleles determine whether an organism is homozygous or heterozygous for the gene. An organism with two identical alleles for a gene is homozygous for that gene. A pea plant with the genotype FF or ff is homozygous for the flower color gene. An organism with two different alleles for a gene is heterozygous for that gene. A pea plant with the genotype Ff is heterozygous for the flower color gene. The types of alleles in an organism's genotype determine the organism's phenotype. Some alleles have types called dominant and recessive. These two types can cause different versions of a trait to appear as the organism's phenotype. A dominant allele causes its version of the trait to appear even when the organism also has a recessive allele for the gene. In pea plants, the F allele, which causes purple flowers, is dominant over the f allele. A pea plant with at least one F allele will have the F allele's version of the flower color trait. So, a plant with the genotype FF or Ff will have purple flowers. A recessive allele causes its version of the trait to appear only when the organism does not have any dominant alleles for the gene. In pea plants, the f allele, which causes white flowers, is recessive to the F allele. A pea plant with only f alleles will have the f allele's version of the flower color trait. So, a plant with the genotype ff will have white flowers.
You need to determine Rollo's phenotype for the whisker type trait. First, consider the alleles in Rollo's genotype for the whisker type gene. Then, decide whether these alleles are dominant or recessive. The allele for straight whiskers (H) is dominant over the allele for curved whiskers (h). This means H is a dominant allele, and h is a recessive allele. Rollo's genotype of Hh has one dominant allele and one recessive allele. An organism with at least one dominant allele for a gene will have the dominant allele's version of the trait. So, Rollo's phenotype for the whisker type trait must be straight whiskers.
What information supports the conclusion that Tucker acquired this trait?
[ "Tucker's friend taught him how to fly a kite.", "Tucker's neighbor taught him how to repair a kite.", "Tucker likes to fly a kite with his younger brother." ]
0
Read the description of a trait. Tucker knows how to fly a kite.
closed choice
grade7
natural science
biology
Genes to traits
Inherited and acquired traits: use evidence to support a statement
Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways. Inherited traits are passed down from biological parents to their offspring through genes. Genes are pieces of hereditary material that contain the instructions that affect inherited traits. Offspring receive their genes, and therefore gain their inherited traits, from their biological parents. Inherited traits do not need to be learned. Acquired traits are gained during a person's life. Some acquired traits, such as riding a bicycle, are gained by learning. Other acquired traits, such as scars, are caused by the environment. Parents do not pass acquired traits down to their offspring.
Select the one animal that has all of the mammal traits listed above.
[ "Peregrine falcons are the fastest animals in the world! They use their wings to fly quickly and hunt prey. Peregrine falcons also have a beak and feathers. They hatch from eggs with speckled or spotted shells.", "Western gorillas have black, gray, or brown fur. Adult males are sometimes called silverbacks because they have often have gray fur on their backs. Female western gorillas feed their offspring milk." ]
1
Mammals are a group of animals with similar traits. The following traits can be used to identify mammals: They feed their offspring milk. They have fur or hair. Observe the animals and read the descriptions.
closed choice
grade5
natural science
biology
Classification
Use evidence to classify mammals, birds, fish, reptiles, and amphibians
Scientists sort animals with similar traits into groups. This is called classification. Classification helps scientists learn about how animals live. How do scientists classify animals? First, they make observations about an animal. Scientists observe the animal's traits, including its body parts and behavior. Then, scientists compare the animal's traits to other animals' traits. Scientists classify animals with similar traits into a group.
To decide if an animal is part of a group, look at the traits of the group. Mammals have the following traits: They feed their offspring milk. They have fur or hair. Compare each animal's traits to the group's traits. Select the animal with traits similar to the group's traits. A peregrine falcon has the following traits: It has feathers. It has wings. It has a beak. It makes eggs with shells. A peregrine falcon does not have all of the traits of a mammal. A peregrine falcon is a bird. A western gorilla has the following traits: It feeds its offspring milk. It has fur. A western gorilla has the traits of a mammal. A western gorilla is a mammal.
Using only these supplies, which question can Mabel investigate with an experiment?
[ "If squash seeds and tomato seeds are planted with compost, which type of plant grows larger?", "Do squash plants grow larger if the seeds are planted in small pots or in large pots?", "Do squash plants grow larger if the seeds are planted with compost or without compost?" ]
2
Mabel has a small vegetable garden, which includes a compost pile of food scraps. She notices that some of the squash plants growing next to the compost pile grow differently than squash plants that are farther away. She wonders what factors affect how her squash plants grow. So, she decides to design an experiment. She has the following supplies available: one type of squash seeds four large clay pots soil a compost pile water
closed choice
grade7
natural science
science-and-engineering-practices
Designing experiments
Identify questions that can be investigated with a set of materials
Experiments can be designed to answer specific questions. When designing an experiment, you must identify the supplies that are necessary to answer your question. In order to do this, you need to figure out what will be tested and what will be measured during the experiment. Imagine that you are wondering if plants grow to different heights when planted in different types of soil. How might you decide what supplies are necessary to conduct this experiment? First, you need to identify the part of the experiment that will be tested, which is the independent variable. This is usually the part of the experiment that is different or changed. In this case, you would like to know how plants grow in different types of soil. So, you must have different types of soil available. Next, you need to identify the part of the experiment that will be measured or observed, which is the dependent variable. In this experiment, you would like to know if some plants grow taller than others. So, you must be able to compare the plants' heights. To do this, you can observe which plants are taller by looking at them, or you can measure their exact heights with a meterstick. So, if you have different types of soil and can observe or measure the heights of your plants, then you have the supplies you need to investigate your question with an experiment!
Based on this information, what is this fly's phenotype for the eye color trait?
[ "brown eyes", "red eyes" ]
0
In a group of fruit flies, some individuals have red eyes and others have brown eyes. In this group, the gene for the eye color trait has two alleles. The allele for red eyes (E) is dominant over the allele for brown eyes (e). A certain fruit fly from this group has the homozygous genotype ee for the eye color gene.
closed choice
grade7
natural science
biology
Genes to traits
Genetics vocabulary: dominant and recessive
All organisms have pieces of hereditary material called genes, which are passed from parents to offspring. Genes contain instructions for building the parts of an organism. An organism's genes affect its observable traits, including its appearance, its behavior, and which diseases it may have. Genes may have different alleles, or forms, that can cause different versions of a trait. For example, flower color is a trait in pea plants. The gene for this trait has two possible alleles. Each allele is represented by an uppercase or lowercase letter. The allele F is for purple flowers, and the allele f is for white flowers. Each pea plant has two alleles for the flower color gene—one allele inherited from each parent. An organism's genotype for a gene is its combination of alleles for that gene. So, a pea plant may have a genotype of FF, Ff, or ff for the flower color gene. An organism's phenotype for a trait is its observable version of that trait, which depends on the organism's combination of alleles. A pea plant may have a phenotype of purple flowers or white flowers for the flower color trait. Some traits, like flower color in pea plants, are controlled by a single gene. Most plants and animals have a genotype made up of two alleles for these traits. These two alleles determine whether an organism is homozygous or heterozygous for the gene. An organism with two identical alleles for a gene is homozygous for that gene. A pea plant with the genotype FF or ff is homozygous for the flower color gene. An organism with two different alleles for a gene is heterozygous for that gene. A pea plant with the genotype Ff is heterozygous for the flower color gene. The types of alleles in an organism's genotype determine the organism's phenotype. Some alleles have types called dominant and recessive. These two types can cause different versions of a trait to appear as the organism's phenotype. A dominant allele causes its version of the trait to appear even when the organism also has a recessive allele for the gene. In pea plants, the F allele, which causes purple flowers, is dominant over the f allele. A pea plant with at least one F allele will have the F allele's version of the flower color trait. So, a plant with the genotype FF or Ff will have purple flowers. A recessive allele causes its version of the trait to appear only when the organism does not have any dominant alleles for the gene. In pea plants, the f allele, which causes white flowers, is recessive to the F allele. A pea plant with only f alleles will have the f allele's version of the flower color trait. So, a plant with the genotype ff will have white flowers.
The fruit fly's genotype for the eye color gene is ee. The fruit fly's genotype of ee has only e alleles. The e allele is for brown eyes. So, the fruit fly's phenotype for the eye color trait must be brown eyes. To check this answer, consider whether the fruit fly's alleles are dominant or recessive. The allele for red eyes (E) is dominant over the allele for brown eyes (e). This means E is a dominant allele, and e is a recessive allele. The fruit fly's genotype of ee has only recessive alleles. An organism with only recessive alleles for a gene will have the recessive allele's version of the trait. So, the fruit fly's phenotype for the eye color trait must be brown eyes.
What is the volume of an eyedropper?
[ "4 liters", "4 milliliters" ]
1
Select the better estimate.
closed choice
grade5
natural science
units-and-measurement
Units and measurement
Choose metric units of volume
Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means. Volume is a measurement of how much space something takes up. There are many different units of volume. When you are using metric units, volume may be written in units of milliliters or liters. There are 1,000 milliliters in 1 liter. So, 1 milliliter is much less than 1 liter. A raindrop has a volume of about 20 milliliters, while a large soda bottle has a volume of 2 liters. The flask shown here measures volumes up to 500 milliliters.
The better estimate for the volume of an eyedropper is 4 milliliters. 4 liters is too much.
How long does it take to wash your hands?
[ "2 minutes", "2 seconds" ]
0
Select the better estimate.
closed choice
grade3
natural science
units-and-measurement
Units and measurement
Choose units of time
Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means. Imagine being told that the bus leaves in 7. You might be thinking, 7 what? Does the bus leave in 7 minutes? 7 seconds? The number 7 on its own does not give you much information about when the bus is leaving. That is because the units are missing. Time is usually measured in units of seconds, minutes, or hours. It takes about 1 second to sneeze and 1 minute to get dressed in the morning. It takes about 1 hour to bake a pie in the oven. There are 60 seconds in 1 minute. So, 1 second is much less than 1 minute. There are 60 minutes in 1 hour. So, 1 minute is much less than 1 hour.
The better estimate for how long it takes to wash your hands is 2 minutes. 2 seconds is too fast.
Which of the following is a trait of a living thing?
[ "how much sunshine the living thing gets", "how much water is in the living thing's habitat", "the way the living thing looks" ]
2
closed choice
grade2
natural science
biology
Traits
Introduction to adaptations
A trait is the way a living thing looks or acts. A habitat is the place where a living thing grows or lives. An adaptation is a trait that helps a living thing stay alive in its habitat.
Which word would you find on a dictionary page with the following guide words? gate - goggles
[ "genuine", "griddle" ]
0
closed choice
grade6
language science
reference-skills
Reference skills
Use guide words
Guide words appear on each page of a dictionary. They tell you the first word and last word on the page. The other words on the page come between the guide words in alphabetical order. To put words in alphabetical order, put them in order by their first letters. If the first letters are the same, look at the second letters. If the second letters are the same, look at the third letters, and so on. If one word is shorter, and there are no more letters to compare, then the shorter word comes first in alphabetical order. For example, be comes before bed.
Put the words in alphabetical order. Since genuine is between the guide words gate - goggles, it would be found on that page.
Which correctly shows the title of a movie?
[ "\"All the King's Men\"", "***All the King's Men***" ]
1
closed choice
grade5
language science
punctuation
Formatting
Formatting titles
The title of a book, movie, play, TV show, magazine, or newspaper should be in italics. If you write it by hand, it can be underlined instead. A Midsummer Night's Dream The title of a poem, song, article, or short story should be in quotation marks. "You Are My Sunshine"
A movie should be in italics. The correct title is **All the King's Men**.
Which figure of speech is used in this text? Study without thought is vain; thought without study is dangerous. —Confucius, Analects
[ "chiasmus", "assonance" ]
0
closed choice
grade12
language science
figurative-language
Literary devices
Classify the figure of speech: anaphora, antithesis, apostrophe, assonance, chiasmus, understatement
Figures of speech are words or phrases that use language in a nonliteral or unusual way. They can make writing more expressive. Anaphora is the repetition of the same word or words at the beginning of several phrases or clauses. We are united. We are powerful. We are winners. Antithesis involves contrasting opposing ideas within a parallel grammatical structure. I want to help, not to hurt. Apostrophe is a direct address to an absent person or a nonhuman entity. Oh, little bird, what makes you sing so beautifully? Assonance is the repetition of a vowel sound in a series of nearby words. Try to light the fire. Chiasmus is an expression in which the second half parallels the first but reverses the order of words. Never let a fool kiss you or a kiss fool you. Understatement involves deliberately representing something as less serious or important than it really is. As you know, it can get a little cold in the Antarctic.
The text uses chiasmus, an expression in which the second half parallels the first but reverses the order of words. The second half of the sentence reverses the order of the words study and thought relative to the first half.
Which word would you find on a dictionary page with the following guide words? couch - cupboard
[ "crane", "chilly" ]
0
closed choice
grade6
language science
reference-skills
Reference skills
Use guide words
Guide words appear on each page of a dictionary. They tell you the first word and last word on the page. The other words on the page come between the guide words in alphabetical order. To put words in alphabetical order, put them in order by their first letters. If the first letters are the same, look at the second letters. If the second letters are the same, look at the third letters, and so on. If one word is shorter, and there are no more letters to compare, then the shorter word comes first in alphabetical order. For example, be comes before bed.
Put the words in alphabetical order. Since crane is between the guide words couch - cupboard, it would be found on that page.
Is the following trait inherited or acquired? Bert has a scar on his left knee.
[ "inherited", "acquired" ]
1
Hint: Most scars are caused by accidents during a person's life.
closed choice
grade3
natural science
biology
Heredity
Identify inherited and acquired traits
Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways. Inherited traits are passed down through families. Children gain these traits from their parents. Inherited traits do not need to be learned. Acquired traits are gained during a person's life. Some acquired traits, such as riding a bicycle, are gained by learning. Other acquired traits, such as scars, are caused by the environment. Children do not inherit their parents' acquired traits.
Children do not inherit their parent's scars. Instead, scars are caused by the environment. People can get scars after they get hurt. So, having a scar is an acquired trait.
Select the one animal that has all of the fish traits listed above.
[ "Salmon lay eggs with no shells at the bottom of freshwater streams. Salmon use their powerful fins to swim. They can even jump up small waterfalls!", "Red salamanders do not have lungs! They can breathe through their moist, smooth skin. Adult red salamanders live near rivers or ponds. They lay eggs with no shells under rocks or logs. The baby red salamanders live underwater." ]
0
Fish are a group of animals with similar traits. The following traits can be used to identify fish: They have fins, not limbs. They make eggs with no shells. Observe the animals and read the descriptions.
closed choice
grade5
natural science
biology
Classification
Use evidence to classify mammals, birds, fish, reptiles, and amphibians
Scientists sort animals with similar traits into groups. This is called classification. Classification helps scientists learn about how animals live. How do scientists classify animals? First, they make observations about an animal. Scientists observe the animal's traits, including its body parts and behavior. Then, scientists compare the animal's traits to other animals' traits. Scientists classify animals with similar traits into a group.
To decide if an animal is part of a group, look at the traits of the group. Fish have the following traits: They have fins, not limbs. They make eggs with no shells. Compare each animal's traits to the group's traits. Select the animal with traits similar to the group's traits. A salmon has the following traits: It has fins, not limbs. It makes eggs with no shells. A salmon has the traits of a fish. A salmon is a fish. A red salamander has the following traits: It spends part of its life in water and part on land. It has moist skin. It makes eggs with no shells. A red salamander does not have all of the traits of a fish. A red salamander is an amphibian.
Which is a run-on sentence?
[ "The fertilizer will help the plants grow.", "Dad has a beard it is black and bushy." ]
1
closed choice
grade3
language science
writing-strategies
Sentences, fragments, and run-ons
Is it a complete sentence, a fragment, or a run-on?
A sentence is a group of words that forms a complete thought. It has both a subject and a verb. My friends walk along the path. A sentence fragment is a group of words that does not express a complete thought. It is usually missing a subject or a verb. Knows the answer. This is a sentence fragment. It is missing a subject. Who knows the answer? She knows the answer. The bright red car. This is a sentence fragment. It is missing a verb. What did the bright red car do? The bright red car stopped. A run-on sentence is made up of two sentences that are joined without end punctuation or with just a comma. I knocked on the door it opened. It started raining, we ran inside. To fix a run-on sentence, separate it into two sentences. Add end punctuation after the first sentence, and capitalize the second sentence. I knocked on the door. It opened. It started raining. We ran inside. You can also fix a run-on sentence by rewriting it as a compound sentence. A compound sentence is two sentences joined by a comma and a conjunction such as and, but, or, or so. I knocked on the door, and it opened. It started raining, so we ran inside.
Dad has a beard it is black and bushy is a run-on sentence. It has two sentences that are joined without end punctuation: Dad has a beard and It is black and bushy.
Which word would you find on a dictionary page with the following guide words? pond - purple
[ "pretty", "people" ]
0
closed choice
grade3
language science
reference-skills
Reference skills
Use guide words
Guide words appear on each page of a dictionary. They tell you the first word and last word on the page. The other words on the page come between the guide words in alphabetical order. To put words in alphabetical order, put them in order by their first letters. If the first letters are the same, look at the second letters. If the second letters are the same, look at the third letters, and so on. If one word is shorter, and there are no more letters to compare, then the shorter word comes first in alphabetical order. For example, be comes before bed.
Put the words in alphabetical order. Since pretty is between the guide words pond - purple, it would be found on that page.
Which figure of speech is used in this text? "Your new hairstyle is so boring!" Daniel remarked when his sister showed up with a pink-and-blue mohawk.
[ "pun", "verbal irony" ]
1
closed choice
grade8
language science
figurative-language
Literary devices
Classify figures of speech
Figures of speech are words or phrases that use language in a nonliteral or unusual way. They can make writing more expressive. Alliteration is the repetition of sounds at the beginning of nearby words. What a lucky little lady you are! An allusion is a brief reference to something or someone well known, often from history or literature. "I'd better get home before I turn into a pumpkin!" Lila remarked. An idiom is an expression that cannot be understood literally. Its meaning must be learned. The assignment was a piece of cake. A simile uses like or as to compare two things that are not actually alike. The cat's fur was as dark as the night. A metaphor compares two things that are not actually alike without using like or as. The snow formed a blanket over the town. Onomatopoeia involves using a word that expresses a sound. The scrambled eggs hit the floor with a splat. Personification is giving human characteristics to nonhuman things. The trees danced in the wind. A pun involves using a word or phrase in a humorous way that suggests more than one meaning. A great new broom is sweeping the nation. Verbal irony involves saying one thing but implying something very different. People often use verbal irony when they are being sarcastic. Olivia seems thrilled that her car keeps breaking down. Each breakdown is as enjoyable as a punch to the face.
The text uses verbal irony, which involves saying one thing but implying something very different. Boring shows verbal irony because Daniel's sister's hairstyle is not at all boring.
What do these two changes have in common? baking cookies burning food on a stove
[ "Both are caused by heating.", "Both are caused by cooling.", "Both are only physical changes." ]
0
closed choice
grade4
natural science
chemistry
Physical and chemical change
Compare physical and chemical changes
Chemical changes and physical changes are two common ways matter can change. In a chemical change, the type of matter changes. The types of matter before and after a chemical change are always different. Some chemical changes are caused by heating or cooling. For example, burning a piece of paper is a chemical change caused by heating. When paper gets hot enough, it re­acts with oxygen in the air and burns. The paper and oxygen change into ash and smoke. In a physical change, the type of matter stays the same. The types of matter before and after a physical change are always the same. A change of state is a type of physical change. Changes of state can be caused by heating or cooling. For example, ice melting is a physical change that can be caused by heating. Ice and liquid water are made of the same type of matter: water. The law of conservation of mass says that all physical and chemical changes conserve mass. Conserve means to keep the same. So, the total mass before a physical or chemical change is equal to the total mass after the change.
Step 1: Think about each change. Baking cookies is a chemical change. The type of matter in the cookie dough changes when it is baked. The cookie dough turns into cookies! Burning food on a stove is a chemical change. When the food burns, the type of matter in it changes. The food turns black and gives off smoke. Step 2: Look at each answer choice. Both are only physical changes. Both changes are chemical changes. They are not physical changes. Both are chemical changes. Both changes are chemical changes. The type of matter before and after each change is different. Both are caused by heating. Both changes are caused by heating. Both are caused by cooling. Neither change is caused by cooling.
Use the evidence in the text to select the photosynthetic organism.
[ "Palm trees are commonly found on tropical beaches. Palm trees use carbon dioxide and water to make their food.", "Cecropia moth caterpillars eat leaves, but the adult moths never eat. An adult cecropia moth lives just long enough to find a mate and produce eggs." ]
0
closed choice
grade5
natural science
biology
Plants
Identify the photosynthetic organism
Organisms that carry out photosynthesis are called photosynthetic organisms. During photosynthesis, these organisms use light energy to turn water and carbon dioxide into sugars and oxygen. Photosynthetic organisms also often have the following characteristics: They are producers, which are organisms that make their own food inside their cells. Producers don't usually eat other organisms. Their cells contain chloroplasts. Chloroplasts are cell parts where photosynthesis occurs. Their chloroplasts often contain chlorophyll, which is green. Chlorophyll captures energy from sunlight to power photosynthesis. They use the sugars they make during photosynthesis as food. This food provides the organisms with the energy they need to live.
This organism is photosynthetic: The text tells you that palm trees use carbon dioxide and water to make food. This is evidence that the palm tree is a photosynthetic organism. This organism is not photosynthetic: The text does not provide evidence that the cecropia moth is photosynthetic.
How long is a bike path?
[ "3 feet", "3 inches", "3 yards", "3 miles" ]
3
Select the best estimate.
closed choice
grade7
natural science
units-and-measurement
Units and measurement
Choose customary units of distance, mass, and volume
Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means. When you are using customary units, length may be written with units of inches, feet, yards, or miles. There are 12 inches in 1 foot, and 3 feet in 1 yard. There are 5,280 feet in 1 mile. A football is about 1 foot long. A football field is 100 yards long.
The best estimate for the length of a bike path is 3 miles. 3 inches, 3 feet, and 3 yards are all too short.
Which is the stickiest?
[ "wood ruler", "glass marbles", "honey" ]
2
closed choice
grade4
natural science
physics
Materials
Compare properties of materials
Every object is made of one or more materials. A material is a type of matter. Wood, glass, metal, and plastic are common materials. A material has different properties. A material's properties tell you how it looks, feels, tastes, or smells. Some examples of properties are shiny, hard, fragile, and stretchy. For example, a shiny material reflects a lot of light. A fragile material breaks when you drop it.
Sticky is a property. A sticky material easily attaches to other things. Look at each picture, one at a time. Imagine touching the material shown in each picture. Of the choices, the honey is the stickiest. If you touch honey, it will stick to you.
Is this a run-on sentence? Overcome with joy, Mrs. Cohen told her husband the exciting news about her promotion.
[ "no", "yes" ]
0
yes or no
grade12
language science
writing-strategies
Sentences, fragments, and run-ons
Identify run-on sentences
A sentence is a group of words that expresses a complete thought. The band I'm in has been rehearsing daily because we have a concert in two weeks. A run-on sentence is formed when two sentences are run together, joined by just a comma or by no punctuation at all. If only a comma is used, the run-on is called a comma splice. The band I'm in has been rehearsing daily, we have a concert in two weeks. The band I'm in has been rehearsing daily we have a concert in two weeks. There are several ways to fix a run-on sentence: Use stronger punctuation, such as a period or a semicolon. The band I'm in has been rehearsing daily. We have a concert in two weeks. The band I'm in has been rehearsing daily; we have a concert in two weeks. Use a comma and a coordinating conjunction to create a compound sentence. Coordinating conjunctions include and, but, or, and so. The band I'm in has been rehearsing daily, and we have a concert in two weeks. Use a subordinating conjunction or a relative pronoun to create a complex sentence. Subordinating conjunctions include after, although, as, because, before, if, since, unless, until, when, and while. Relative pronouns include that, which, who, whom, and whose. The band I'm in has been rehearsing daily since we have a concert in two weeks.
This is not a run-on sentence. It is not formed from two sentences that have been run together without appropriate punctuation. Overcome with joy, Mrs. Cohen told her husband the exciting news about her promotion.
Which tense does the sentence use? Matt will pop the popcorn.
[ "future tense", "present tense", "past tense" ]
0
closed choice
grade2
language science
verbs
Verb tense
Is the sentence in the past, present, or future tense?
Present tense verbs tell you about something that is happening now. Most present-tense verbs are regular. They have no ending, or they end in -s or -es. Two verbs are irregular in the present tense, to be and to have. You must remember their forms. Past tense verbs tell you about something that has already happened. Most past-tense verbs are regular. They end in -ed. Some verbs are irregular in the past tense. You must remember their past-tense forms. Future tense verbs tell you about something that is going to happen. All future-tense verbs use the word will. Present | Past | Future walk, walks | walked | will walk go, goes | went | will go
The sentence is in future tense. You can tell because it uses will before the main verb, pop. The verb tells you about something that is going to happen.
Which object has more thermal energy?
[ "a bowl of cereal at a temperature of 40°F", "a bowl of cereal at a temperature of 50°F" ]
1
The objects are identical except for their temperatures.
closed choice
grade3
natural science
physics
Heat and thermal energy
How is temperature related to thermal energy?
All solids, liquids, and gases are made of matter. Matter is made up of tiny particles that are always moving. The energy from the motion of these particles is called thermal energy. Temperature measures how hot or cold matter is. If the particles in matter move faster, the temperature goes up. The matter now has both more thermal energy and a higher temperature.
The two bowls of cereal have the same mass but different temperatures. Since the 50°F bowl of cereal is hotter than the 40°F bowl of cereal, it has more thermal energy.
Which word would you find on a dictionary page with the following guide words? leap - lucky
[ "lay", "lord" ]
1
closed choice
grade2
language science
reference-skills
Reference skills
Use guide words
Guide words appear on each page of a dictionary. They tell you the first word and last word on the page. The other words on the page come between the guide words in alphabetical order. To put words in alphabetical order, put them in order by their first letters. If the first letters are the same, look at the second letters. If the second letters are the same, look at the third letters, and so on.
Put the words in alphabetical order. Since lord is between the guide words leap - lucky, it would be found on that page.
Which object has more thermal energy?
[ "a 5-kilogram brick at a temperature of 365°F", "a 5-kilogram brick at a temperature of 285°F" ]
0
The objects are identical except for their temperatures.
closed choice
grade3
natural science
physics
Heat and thermal energy
How is temperature related to thermal energy?
All solids, liquids, and gases are made of matter. Matter is made up of tiny particles that are always moving. The energy from the motion of these particles is called thermal energy. Temperature measures how hot or cold matter is. If the particles in matter move faster, the temperature goes up. The matter now has both more thermal energy and a higher temperature.
The two bricks have the same mass but different temperatures. Since the 365°F brick is hotter than the 285°F brick, it has more thermal energy.
What is the volume of a kitchen sink?
[ "14 gallons", "14 cups", "14 fluid ounces" ]
0
Select the best estimate.
closed choice
grade5
natural science
units-and-measurement
Units and measurement
Choose customary units of volume
Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means. Volume is a measurement of how much space something takes up. There are many different units of volume. When you are using customary units, volume may be written in units of fluid ounces, cups, or gallons. As the diagram shows, there are 8 fluid ounces in 1 cup and 16 cups in 1 gallon. So, 1 fluid ounce is less than 1 cup and much less than 1 gallon. A glass of milk has a volume of about 8 fluid ounces, or 1 cup. A jug of milk has a volume of 1 gallon.
The best estimate for the volume of a kitchen sink is 14 gallons. 14 fluid ounces and 14 cups are both too little.
Select the living thing.
[ "hummingbird", "yo-yo" ]
0
closed choice
grade3
natural science
biology
Classification
Identify living and nonliving things
All living things need food and water. Water helps living things break down food and remove waste. Food gives living things energy. Living things use this energy to grow and change. All living things grow and change during their lives. All living things sense changes in the world around them. Living things might sense changes by seeing, smelling, hearing, or feeling. Living things can respond to the changes they sense.
A yo-yo is not a living thing. Yo-yos do not have all of the traits of living things. They do not grow or respond to the world around them. They do not need food or water. A hummingbird is a living thing. Hummingbirds grow and respond to the world around them. They need food and water.
What is the source of the allusion in the sentence below? Wayne described the situation he was facing with his boss as a catch-22.
[ "literature", "a song" ]
0
closed choice
grade11
language science
figurative-language
Literary devices
Recall the source of an allusion
An allusion is a brief mention of something or someone well known, often from mythology, history, or literature. An allusion lets you reference ideas from an entire story in just a few words. The protean nature of the disease makes it difficult to diagnose. The word protean is an allusion to the sea god Proteus in Greek mythology. Because the sea is constantly changing, to describe something as protean suggests that it is variable or in flux.
The source of the allusion catch-22 is literature. Joseph Heller coined the term "catch-22" in his 1961 novel of the same name. In the novel, if an army pilot wants to avoid dangerous missions, he must be deemed mentally unfit; however, his desire to stay safe proves his sanity, so he can never be excused from a mission. Heller called this sort of predicament or dilemma a catch-22. The allusion catch-22 means a no-win situation.
What does the metaphor in this text suggest? When Ted lost his job, he was devastated. The only light in the sea of darkness was the prospect of pursuing a new career.
[ "There was a benefit to Ted's job loss.", "Having to pursue a new career was the worst part of Ted's job loss." ]
0
closed choice
grade12
language science
figurative-language
Literary devices
Interpret the figure of speech
Figures of speech are words or phrases that use language in a nonliteral or unusual way. They can make writing more expressive. A metaphor compares two things that are not actually alike without using like or as. The snow formed a blanket over the town.
The text uses a metaphor, comparing two things that are not actually alike without using like or as. The metaphor the only light in the sea of darkness was the prospect of pursuing a new career suggests that there was a benefit to Ted's job loss. A light would be beneficial in helping someone escape a dark, difficult-to-navigate situation. Similarly, Ted's new career was beneficial in helping him escape the emotionally difficult experience of losing his job.
Which change best matches the sentence? Pieces of rock and soil are washed away by water.
[ "wildfire", "erosion", "earthquake" ]
1
closed choice
grade3
natural science
earth-science
Earth events
Classify changes to Earth's surface I
What information supports the conclusion that Luke acquired this trait?
[ "Luke's brother has scars on both of his knees.", "Luke's scar is on his left knee. His mother also has a scar on her left knee.", "Luke's scar was caused by an accident. He cut his leg when he fell off his skateboard." ]
2
Read the description of a trait. Luke has a scar on his left knee.
closed choice
grade8
natural science
biology
Genes to traits
Inherited and acquired traits: use evidence to support a statement
Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways. Inherited traits are passed down from biological parents to their offspring through genes. Genes are pieces of hereditary material that contain the instructions that affect inherited traits. Offspring receive their genes, and therefore gain their inherited traits, from their biological parents. Inherited traits do not need to be learned. Acquired traits are gained during a person's life. Some acquired traits, such as riding a bicycle, are gained by learning. Other acquired traits, such as scars, are caused by the environment. Parents do not pass acquired traits down to their offspring.