Unnamed: 0
int64 | questionID
string | lessonName
string | beingAsked
string | imageName
string | imagePath
string | questionType
string | answerChoices
string | correctAnswer
string |
|---|---|---|---|---|---|---|---|---|
5,100 | NDQ_016872 | electric conductors and insulators | electric current can travel across space as well as through matter. | null | null | Multiple Choice | a. true, b. false | b |
5,101 | NDQ_016875 | electric conductors and insulators | examples of materials that have low resistance to electric current include | null | null | Multiple Choice | a. water containing impurities., b. rubber., c. plastic., d. all of the above | a |
5,102 | NDQ_016877 | electric conductors and insulators | examples of materials that have high resistance to electric current include | null | null | Multiple Choice | a. wood., b. steel., c. copper., d. two of the above | a |
5,103 | NDQ_016879 | electric conductors and insulators | electric current always travels through the material of least resistance. | null | null | Multiple Choice | a. true, b. false | a |
5,104 | NDQ_016880 | electric conductors and insulators | dry air is an electric insulator. | null | null | Multiple Choice | a. true, b. false | a |
5,105 | NDQ_016882 | electric current | electric current is measured as the amount of charge that flows past a given point in a certain amount of time. | null | null | Multiple Choice | a. true, b. false | a |
5,106 | NDQ_016883 | electric current | the si unit for electric current is the | null | null | Multiple Choice | a. amp., b. watt., c. volt., d. ohm. | a |
5,107 | NDQ_016884 | electric current | electric current always flows in just one direction. | null | null | Multiple Choice | a. true, b. false | b |
5,108 | NDQ_016886 | electric current | electric charges always move from a position of lower potential energy to a position of higher potential energy. | null | null | Multiple Choice | a. true, b. false | b |
5,109 | NDQ_016889 | electric current | electric charges flow only when they have electric | null | null | Multiple Choice | a. power., b. potential difference., c. resistance., d. none of the above | b |
5,110 | NDQ_016892 | electric fields | charged particles can exert force on each other only when they are actually touching. | null | null | Multiple Choice | a. true, b. false | b |
5,111 | NDQ_016895 | electric fields | electric field lines around a positively charged particle show that force is directed | null | null | Multiple Choice | a. away from the particle., b. toward the particle., c. in a circle around the particle., d. none of the above | a |
5,112 | NDQ_016896 | electric fields | electric field lines around a negatively charged particle show that force is directed | null | null | Multiple Choice | a. away from the particle., b. toward the particle., c. in a circle around the particle., d. none of the above | b |
5,113 | NDQ_016897 | electric fields | when charged particles are close enough to exert force on each other, their electric fields interact. | null | null | Multiple Choice | a. true, b. false | a |
5,114 | NDQ_016898 | electric fields | when oppositely charged particles exert force on each other, their lines of force | null | null | Multiple Choice | a. bend toward each other., b. push apart from each other., c. cancel each other out., d. form longitudinal waves. | a |
5,115 | NDQ_016899 | electric fields | when particles with the same charge exert force on each other, their lines of force | null | null | Multiple Choice | a. wrap around each other., b. bend away from each other., c. reinforce each other., d. form surface waves. | b |
5,116 | NDQ_016905 | electric generators | electric generators may be set up to produce either direct or alternating current. | null | null | Multiple Choice | a. true, b. false | a |
5,117 | NDQ_016906 | electric generators | electric generators in cars produce only direct current. | null | null | Multiple Choice | a. true, b. false | b |
5,118 | NDQ_016907 | electric generators | the kinetic energy needed for a car generator comes from the | null | null | Multiple Choice | a. battery., b. crankshaft., c. brakes., d. none of the above | b |
5,119 | NDQ_016908 | electric generators | electricity from a car generator is | null | null | Multiple Choice | a. stored in the battery., b. used to run the car’s electric devices., c. used to turn the wheels., d. two of the above | d |
5,120 | NDQ_016911 | electric power and electrical energy use | electric power is the rate at which an electric device changes electrical energy to another form of energy. | null | null | Multiple Choice | a. true, b. false | a |
5,121 | NDQ_016913 | electric power and electrical energy use | which equation can be used to calculate the power of an electric device? | null | null | Multiple Choice | a. Power = Current x Voltage, b. Power = Current/Voltage, c. Power = Voltage/Current, d. none of the above | a |
5,122 | NDQ_016914 | electric power and electrical energy use | a watt equals one | null | null | Multiple Choice | a. volt per second., b. amp per second., c. ohm per second., d. joule per second. | d |
5,123 | NDQ_016915 | electric power and electrical energy use | one kilowatt equals 100 watts. | null | null | Multiple Choice | a. true, b. false | b |
5,124 | NDQ_016916 | electric power and electrical energy use | if an electric device in a 120-volt circuit uses 10 amps of current, then the power of the device is | null | null | Multiple Choice | a. 1200 watts., b. 130 watts., c. 110 watts., d. 12 watts. | a |
5,125 | NDQ_016918 | electric power and electrical energy use | which equation can be used to calculate the electrical energy used by an appliance? | null | null | Multiple Choice | a. Energy = Power/Time, b. Energy = Power x Time, c. Energy = Time/Power, d. Energy = Power + Time | b |
5,126 | NDQ_016922 | electric resistance | the si unit for electric resistance is the | null | null | Multiple Choice | a. amp., b. watt., c. volt., d. ohm. | d |
5,127 | NDQ_016923 | electric resistance | resistance reduces the amount of electrical energy that is transferred through matter. | null | null | Multiple Choice | a. true, b. false | a |
5,128 | NDQ_016924 | electric resistance | all materials have some electric resistance. | null | null | Multiple Choice | a. true, b. false | a |
5,129 | NDQ_016927 | electric resistance | factors that affect the electric resistance of a wire include the wires | null | null | Multiple Choice | a. chemical makeup., b. length., c. width., d. all of the above | d |
5,130 | NDQ_016928 | electric resistance | a cooler wire has more electric resistance than a warmer wire. | null | null | Multiple Choice | a. true, b. false | b |
5,131 | NDQ_016931 | electric safety | electric current is dangerous because it can cause | null | null | Multiple Choice | a. electrocution., b. burns., c. fires., d. all of the above | d |
5,132 | NDQ_016934 | electric safety | why does the cord of an electric device contain two electric wires? | null | null | Multiple Choice | a. The two wires make up the two loops of a parallel circuit., b. One wire carries direct current and one wire carries alternating current., c. One wire carries current to the device and one wire carries current away from the device., d. two of the above | c |
5,133 | NDQ_016935 | electric safety | what is the purpose of the round prong on a three-prong plug? | null | null | Multiple Choice | a. It carries any stray electric current into the ground., b. It carries electric current to the appliance., c. It carries electric current away from the appliance., d. none of the above | a |
5,134 | NDQ_016939 | electric safety | you should never use electricity when you are wet or standing in water. | null | null | Multiple Choice | a. true, b. false | a |
5,135 | NDQ_016940 | electric safety | overloading a circuit may cause it to have too much voltage. | null | null | Multiple Choice | a. true, b. false | b |
5,136 | NDQ_016944 | electric transformers | electric transformers may either increase or decrease voltage. | null | null | Multiple Choice | a. true, b. false | a |
5,137 | NDQ_016945 | electric transformers | an electric transformer contains | null | null | Multiple Choice | a. a single electric circuit., b. an iron core., c. a permanent magnet., d. all of the above | b |
5,138 | NDQ_016946 | electric transformers | an electric transformer creates an electromagnet when | null | null | Multiple Choice | a. alternating current passes through the secondary coil., b. the magnetic field of the iron core keeps changing., c. direct current passes through the primary coil., d. none of the above | d |
5,139 | NDQ_016948 | electric transformers | the type of transformer in question 7 would be found on an electric pole outside of a home. | null | null | Multiple Choice | a. true, b. false | b |
5,140 | NDQ_016949 | electric transformers | electromagnetic induction occurs in an electric transformer because the | null | null | Multiple Choice | a. magnetic field keeps reversing., b. secondary coil keeps moving., c. primary coil keeps moving., d. two of the above | a |
5,141 | NDQ_016952 | electrical grid | electrical grids include | null | null | Multiple Choice | a. power plants., b. transmission lines., c. electric substations., d. all of the above | d |
5,142 | NDQ_016956 | electrical grid | the voltage of current that leaves a power plant is increased | null | null | Multiple Choice | a. after the current has been transmitted to homes., b. near the power plant by step-down transformers., c. for the purpose of reducing current in transmission lines., d. two of the above | c |
5,143 | NDQ_016957 | electrical grid | electric transformers use electromagnetic induction to change the resistance in electric lines. | null | null | Multiple Choice | a. true, b. false | b |
5,144 | NDQ_016958 | electrical grid | the main function of electric substations is generating additional electricity. | null | null | Multiple Choice | a. true, b. false | b |
5,145 | NDQ_016959 | electrical grid | electric substations may distribute electricity from a few high-voltage lines to several lower-voltage lines. | null | null | Multiple Choice | a. true, b. false | a |
5,146 | NDQ_016962 | electromagnet | a solenoid has north and south magnetic poles. | null | null | Multiple Choice | a. true, b. false | a |
5,147 | NDQ_016965 | electromagnet | the lines of magnetic force of an electromagnet run | null | null | Multiple Choice | a. from one end of the iron bar to the other., b. in circles around the middle of the iron bar., c. from the south pole to the north pole of the electromagnet., d. two of the above | d |
5,148 | NDQ_016967 | electromagnet | an electromagnet is stronger if | null | null | Multiple Choice | a. the iron bar is bigger., b. there are more turns in the wire., c. more current flows through the wire., d. any of the above | d |
5,149 | NDQ_016969 | electromagnet | electromagnets are the strongest magnets made. | null | null | Multiple Choice | a. true, b. false | a |
5,150 | NDQ_016972 | electromagnetic devices | devices that contain electromagnets include | null | null | Multiple Choice | a. doorbells., b. electric fans., c. hairdryers., d. all of the above | d |
5,151 | NDQ_016973 | electromagnetic devices | an electromagnet has north and south magnetic poles and a magnetic field. | null | null | Multiple Choice | a. true, b. false | a |
5,152 | NDQ_016974 | electromagnetic devices | any device with an electric motor contains an electromagnet. | null | null | Multiple Choice | a. true, b. false | a |
5,153 | NDQ_016975 | electromagnetic devices | turning off the current to an electromagnet has no effect on its magnetic field. | null | null | Multiple Choice | a. true, b. false | b |
5,154 | NDQ_016976 | electromagnetic devices | a doorbell rings when an electromagnet turns off. | null | null | Multiple Choice | a. true, b. false | b |
5,155 | NDQ_016977 | electromagnetic devices | when the clapper of a doorbell moves to strike the bell, it | null | null | Multiple Choice | a. closes the doorbell circuit., b. breaks the doorbell circuit., c. turns on the electromagnet., d. two of the above | b |
5,156 | NDQ_016982 | electromagnetic induction | what is needed for electromagnetic induction to occur? | null | null | Multiple Choice | a. electric conductor, b. magnetic field, c. voltage source, d. two of the above | d |
5,157 | NDQ_016984 | electromagnetic induction | you can generate electric current by moving a permanent magnet inside a coil of wire. | null | null | Multiple Choice | a. true, b. false | a |
5,158 | NDQ_016985 | electromagnetic induction | you can produce more current by electromagnetic induction if you | null | null | Multiple Choice | a. use a wire with more turns in the coil., b. move the magnet or wire coil more quickly., c. use a stronger magnet., d. any of the above | d |
5,159 | NDQ_016986 | electromagnetic induction | electromagnetic induction produces only direct current. | null | null | Multiple Choice | a. true, b. false | b |
5,160 | NDQ_016987 | electromagnetic induction | electromagnetic induction is used in electric | null | null | Multiple Choice | a. motors., b. generators., c. doorbells., d. two of the above | b |
5,161 | NDQ_017013 | electromagnetism | the field described in question 2 runs parallel to the electric wire. | null | null | Multiple Choice | a. true, b. false | b |
5,162 | NDQ_017014 | electromagnetism | the direction of the field described in question 2 depends on the currents | null | null | Multiple Choice | a. voltage., b. resistance., c. direction., d. none of the above | c |
5,163 | NDQ_017015 | electromagnetism | the strength of the field described in question 2 depends on the amount of current flowing through the wire. | null | null | Multiple Choice | a. true, b. false | a |
5,164 | NDQ_017018 | electromagnetism | devices that use electromagnetism include | null | null | Multiple Choice | a. doorbells., b. electric motors., c. loudspeakers., d. all of the above | d |
5,165 | NDQ_017033 | electronic component | types of electronic components include | null | null | Multiple Choice | a. diodes., b. transistors., c. integrated circuits., d. all of the above | d |
5,166 | NDQ_017034 | electronic component | a semiconductor is a solid crystal of boron or phosphorus. | null | null | Multiple Choice | a. true, b. false | b |
5,167 | NDQ_017037 | electronic component | an n-type semiconductor | null | null | Multiple Choice | a. contains boron., b. has extra electrons., c. is like the negative terminal of a battery., d. two of the above | d |
5,168 | NDQ_017038 | electronic component | a diode | null | null | Multiple Choice | a. contains two semiconductors., b. changes current from DC to AC., c. contains only n-type semiconductors., d. two of the above | a |
5,169 | NDQ_017040 | electronic component | an integrated circuit may consist of millions of smaller electronic components. | null | null | Multiple Choice | a. true, b. false | a |
5,170 | NDQ_017044 | electronic device | a single microchip may consist of millions of tiny electronic components. | null | null | Multiple Choice | a. true, b. false | a |
5,171 | NDQ_017045 | electronic device | in a computer, information is encoded by repeatedly switching current on and off. | null | null | Multiple Choice | a. true, b. false | a |
5,172 | NDQ_017047 | electronic device | which string of digits represents a byte? | null | null | Multiple Choice | a. 0101, b. 010111, c. 01011100, d. none of the above | c |
5,173 | NDQ_017048 | electronic device | the part of a computer that carries out program instructions is the | null | null | Multiple Choice | a. hard drive., b. central processing unit., c. read-only memory., d. none of the above | b |
5,174 | NDQ_017049 | electronic device | the part of a computer that stores information permanently is the | null | null | Multiple Choice | a. random-access memory., b. motherboard., c. read-only memory., d. none of the above | c |
5,175 | NDQ_017053 | electronic signal | voltage is a difference in electric potential energy. | null | null | Multiple Choice | a. true, b. false | a |
5,176 | NDQ_017055 | electronic signal | an electronic signal with continuously changing voltage is a digital signal. | null | null | Multiple Choice | a. true, b. false | b |
5,177 | NDQ_017056 | electronic signal | an electronic signal with voltage that repeatedly turns on and off is an analog signal. | null | null | Multiple Choice | a. true, b. false | b |
5,178 | NDQ_017057 | electronic signal | which of the following statements about analog signals is false? | null | null | Multiple Choice | a. They were the first electronic signals invented., b. They are subject to noise., c. They are still the most commonly used electronic signals., d. none of the above | c |
5,179 | NDQ_017058 | electronic signal | which of the following statements about digital signals is true? | null | null | Multiple Choice | a. They are subject to distortion., b. They are more difficult to transmit than analog signals., c. They are less accurate than analog signals., d. none of the above | d |
5,180 | NDQ_017143 | evaporation | which process causes a mud puddle to dry up in the sunshine? | null | null | Multiple Choice | a. boiling, b. vaporization, c. evaporation, d. condensation | c |
5,181 | NDQ_017144 | evaporation | factors that affect the rate of evaporation include the | null | null | Multiple Choice | a. exposed surface area of the liquid., b. temperature of the liquid., c. air movement above the liquid., d. all of the above | d |
5,182 | NDQ_017145 | evaporation | clothes on a clothesline will dry more quickly if the air is dry. | null | null | Multiple Choice | a. true, b. false | a |
5,183 | NDQ_017146 | evaporation | salt water evaporates more quickly than pure water. | null | null | Multiple Choice | a. true, b. false | b |
5,184 | NDQ_017215 | freezing | which of these substances has the highest freezing point? | null | null | Multiple Choice | a. lead, b. helium, c. oxygen, d. nitrogen | a |
5,185 | NDQ_017216 | freezing | which of these substances has a lower freezing point than pure water? | null | null | Multiple Choice | a. salt water, b. carbon, c. sodium, d. iron | a |
5,186 | NDQ_017217 | freezing | a liquid freezes because its particles lose energy. | null | null | Multiple Choice | a. true, b. false | a |
5,187 | NDQ_017219 | freezing | freezing point is a chemical property of matter. | null | null | Multiple Choice | a. true, b. false | b |
5,188 | NDQ_017592 | liquids | particles of a liquid always take the volume of their container. | null | null | Multiple Choice | a. true, b. false | b |
5,189 | NDQ_017594 | liquids | surface tension is the | null | null | Multiple Choice | a. resistance of a liquid to flowing., b. force that causes water to form droplets., c. tendency of fluids to flow downhill., d. friction of particles flowing over a surface. | b |
5,190 | NDQ_017595 | liquids | which of these liquids is most viscous? | null | null | Multiple Choice | a. water, b. milk, c. vinegar, d. honey | d |
5,191 | NDQ_017600 | liquids | surface tension and viscosity are unique properties of liquids. | null | null | Multiple Choice | a. true, b. false | a |
5,192 | NDQ_017632 | matter mass and volume | the only thing that is not matter is energy. | null | null | Multiple Choice | a. true, b. false | a |
5,193 | NDQ_017633 | matter mass and volume | the mass of an object is the | null | null | Multiple Choice | a. amount of matter it contains., b. force of gravity acting on it., c. amount of space it takes up., d. amount of water it displaces. | a |
5,194 | NDQ_017634 | matter mass and volume | the si unit for mass is the gram. | null | null | Multiple Choice | a. true, b. false | b |
5,195 | NDQ_017638 | matter mass and volume | the volume of a liquid is measured with a | null | null | Multiple Choice | a. graduated cylinder., b. metric ruler., c. pan balance., d. scale. | a |
5,196 | NDQ_017663 | melting | which of the following statements about melting is true? | null | null | Multiple Choice | a. Melting is a chemical change., b. Melting is a change of state., c. Melting changes the chemical properties of matter., d. Some substances do not melt no matter how hot they become. | b |
5,197 | NDQ_017664 | melting | melted rock below earths surface is known as lava. | null | null | Multiple Choice | a. true, b. false | b |
5,198 | NDQ_017667 | melting | the melting point of a substance is the same as its freezing point. | null | null | Multiple Choice | a. true, b. false | a |
5,199 | NDQ_017668 | melting | which of these substances has the lowest melting point? | null | null | Multiple Choice | a. iron, b. gold, c. water, d. oxygen | d |
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