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14,500 | NDQ_017167 | external combustion engines | the kinetic energy of an external combustion engine can be used to | null | null | Multiple Choice | a. turn the wheels of a vehicle., b. turn a turbine., c. run other machines., d. all of the above | d |
14,501 | NDQ_017168 | external combustion engines | an external combustion engine burns fuel to heat air. | null | null | Multiple Choice | a. true, b. false | b |
14,502 | NDQ_017170 | external combustion engines | external combustion engines are no longer in use today. | null | null | Multiple Choice | a. true, b. false | b |
14,503 | NDQ_017171 | ferromagnetic material | all materials respond to magnetic force. | null | null | Multiple Choice | a. true, b. false | b |
14,504 | NDQ_017173 | ferromagnetic material | nonmagnetic materials include | null | null | Multiple Choice | a. wood., b. glass., c. plastic., d. all of the above | d |
14,505 | NDQ_017174 | ferromagnetic material | magnetism is due to the movement of electrons within atoms. | null | null | Multiple Choice | a. true, b. false | a |
14,506 | NDQ_017177 | ferromagnetic material | all of the following materials can be magnetized except | null | null | Multiple Choice | a. iron., b. carbon., c. cobalt., d. nickel. | b |
14,507 | NDQ_017178 | ferromagnetic material | if you stroke an iron nail with a bar magnet, the nail will become a temporary magnet. | null | null | Multiple Choice | a. true, b. false | b |
14,508 | NDQ_017179 | ferromagnetic material | a permanent magnet can be demagnetized by | null | null | Multiple Choice | a. dropping it., b. heating it., c. cooling it., d. two of the above | d |
14,509 | NDQ_017192 | force | fundamental forces of the universe include | null | null | Multiple Choice | a. gravity., b. friction., c. electromagnetic force., d. two of the above | d |
14,510 | NDQ_017193 | force | the main forces that affect the motion of everyday objects include | null | null | Multiple Choice | a. gravity., b. friction., c. applied force., d. all of the above | d |
14,511 | NDQ_017196 | force | only some changes in speed or direction are caused by forces. | null | null | Multiple Choice | a. true, b. false | b |
14,512 | NDQ_017197 | force | the force required to change an objects motion depends on the objects mass. | null | null | Multiple Choice | a. true, b. false | a |
14,513 | NDQ_017199 | force | force is a vector. | null | null | Multiple Choice | a. true, b. false | a |
14,514 | NDQ_017203 | forms of energy | energy can change from one form to another. | null | null | Multiple Choice | a. true, b. false | a |
14,515 | NDQ_017207 | forms of energy | the energy of moving electrons is called chemical energy. | null | null | Multiple Choice | a. true, b. false | b |
14,516 | NDQ_017208 | forms of energy | electromagnetic energy includes | null | null | Multiple Choice | a. light energy., b. sound energy., c. heat energy., d. two of the above | a |
14,517 | NDQ_017210 | forms of energy | energy that travels in waves through matter is | null | null | Multiple Choice | a. nuclear energy., b. electrical energy., c. sound energy., d. two of the above | c |
14,518 | NDQ_017223 | frequency and pitch of sound | the pitch of sound depends on the amplitude of sound waves. | null | null | Multiple Choice | a. true, b. false | b |
14,519 | NDQ_017224 | frequency and pitch of sound | compared to a higher-pitched sound, a lower-pitched sound always has a | null | null | Multiple Choice | a. shorter wavelength., b. smaller amplitude., c. lower frequency., d. two of the above | c |
14,520 | NDQ_017225 | frequency and pitch of sound | the frequency of sound waves is measured in | null | null | Multiple Choice | a. meters., b. meters/second., c. hertz., d. none of the above | c |
14,521 | NDQ_017228 | frequency and pitch of sound | dogs can hear sounds that are too high in pitch for humans to hear. | null | null | Multiple Choice | a. true, b. false | a |
14,522 | NDQ_017229 | frequency and pitch of sound | what is the highest-frequency sound that humans normally can hear? | null | null | Multiple Choice | a. 20 Hz, b. 200 Hz, c. 2000 Hz, d. 20,000 Hz | d |
14,523 | NDQ_017233 | friction | only rough surfaces have friction between them. | null | null | Multiple Choice | a. true, b. false | b |
14,524 | NDQ_017236 | friction | factors that affect friction between two surface include the | null | null | Multiple Choice | a. smoothness of the two surfaces., b. area of the two surfaces., c. amount of force pressing the two surfaces together., d. all of the above | d |
14,525 | NDQ_017237 | friction | heavier objects have less friction with the floor than lighter objects. | null | null | Multiple Choice | a. true, b. false | b |
14,526 | NDQ_017238 | friction | the blades of your skates slide more easily over ice than do the soles of your shoes because the skate blades | null | null | Multiple Choice | a. exert less force on the ice., b. make you weigh less on the ice., c. have less surface area in contact with the ice., d. none of the above | c |
14,527 | NDQ_017239 | friction | friction produces heat because it causes molecules to move faster and have more energy. | null | null | Multiple Choice | a. true, b. false | a |
14,528 | NDQ_017240 | friction | engine oil reduces friction between the moving parts in a car engine by | null | null | Multiple Choice | a. cooling the engine., b. reducing the forces on the parts., c. making the parts slippery., d. two of the above | c |
14,529 | NDQ_017242 | fundamental particles | which fundamental particle was discovered first? | null | null | Multiple Choice | a. gluon, b. photon, c. quark, d. electron | d |
14,530 | NDQ_017243 | fundamental particles | fundamental particles that make up protons and neutrons are known as | null | null | Multiple Choice | a. bosons., b. leptons., c. quarks., d. none of the above | c |
14,531 | NDQ_017244 | fundamental particles | scientists think that leptons and quarks are held together by neutrinos. | null | null | Multiple Choice | a. true, b. false | b |
14,532 | NDQ_017245 | fundamental particles | in ordinary matter, virtually all quarks are strange quarks and charm quarks. | null | null | Multiple Choice | a. true, b. false | b |
14,533 | NDQ_017247 | fundamental particles | fundamental forces that affect matter include | null | null | Multiple Choice | a. gravitational force., b. electromagnetic force., c. weak nuclear force., d. all of the above | d |
14,534 | NDQ_017251 | gamma decay | gamma rays | null | null | Multiple Choice | a. are waves of electric and magnetic energy., b. travel at the speed of light., c. have more energy than any other electromagnetic waves., d. all of the above | d |
14,535 | NDQ_017254 | gamma decay | radioactive nuclei undergo decay because they are unstable. | null | null | Multiple Choice | a. true, b. false | a |
14,536 | NDQ_017255 | gamma decay | in gamma decay, both particles of matter and energy are emitted. | null | null | Multiple Choice | a. true, b. false | b |
14,537 | NDQ_017257 | gamma decay | gamma decay results in a nucleus with a different number of protons. | null | null | Multiple Choice | a. true, b. false | b |
14,538 | NDQ_017261 | gamma rays | higher-energy electromagnetic waves have lower frequencies. | null | null | Multiple Choice | a. true, b. false | b |
14,539 | NDQ_017263 | gamma rays | gamma rays have wavelengths shorter than the nucleus of an atom. | null | null | Multiple Choice | a. true, b. false | a |
14,540 | NDQ_017264 | gamma rays | the frequencies of gamma rays are | null | null | Multiple Choice | a. higher than 1019 hertz., b. lower than a billion waves per second., c. higher than the frequencies of X rays., d. two of the above | d |
14,541 | NDQ_017265 | gamma rays | sources of gamma rays include | null | null | Multiple Choice | a. the sun., b. collapsing stars., c. radioactive decay., d. all of the above | d |
14,542 | NDQ_017266 | gamma rays | gamma rays from space are absorbed by earths atmosphere. | null | null | Multiple Choice | a. true, b. false | a |
14,543 | NDQ_017267 | gamma rays | gamma rays can pass through | null | null | Multiple Choice | a. bones., b. teeth., c. skin., d. all of the above | d |
14,544 | NDQ_017282 | gravity | gravity acts only between objects that are touching. | null | null | Multiple Choice | a. true, b. false | b |
14,545 | NDQ_017283 | gravity | the strength of gravity between two objects depends on their | null | null | Multiple Choice | a. size., b. volume., c. mass., d. all of the above | c |
14,546 | NDQ_017284 | gravity | which of the following objects has the greatest gravity? | null | null | Multiple Choice | a. the moon, b. the sun, c. Earth, d. you | b |
14,547 | NDQ_017286 | gravity | there is gravitational attraction between you and every object around you. | null | null | Multiple Choice | a. true, b. false | a |
14,548 | NDQ_017290 | gravity | weight is measured with a balance. | null | null | Multiple Choice | a. true, b. false | b |
14,549 | NDQ_017292 | groups with metalloids | the groups in question 1 are the only groups in the periodic that contain elements in more than one class. | null | null | Multiple Choice | a. true, b. false | a |
14,550 | NDQ_017294 | groups with metalloids | metalloids include the element | null | null | Multiple Choice | a. gallium., b. phosphorus., c. selenium., d. germanium. | d |
14,551 | NDQ_017295 | groups with metalloids | which of the following is a property of metalloids? | null | null | Multiple Choice | a. malleability, b. brittleness, c. dullness, d. all of the above | b |
14,552 | NDQ_017296 | groups with metalloids | which of the following statements is (are) true of boron? | null | null | Multiple Choice | a. It has three valence electrons., b. It is fairly reactive., c. It is a solid at room temperature., d. all of the above | d |
14,553 | NDQ_017297 | groups with metalloids | carbon is a metalloid. | null | null | Multiple Choice | a. true, b. false | b |
14,554 | NDQ_017298 | groups with metalloids | all group 15 elements are very reactive. | null | null | Multiple Choice | a. true, b. false | b |
14,555 | NDQ_017302 | halogens | which of the following elements is not a halogen? | null | null | Multiple Choice | a. bromine, b. chlorine, c. selenium, d. iodine | c |
14,556 | NDQ_017303 | halogens | the halogen named astatine is radioactive. | null | null | Multiple Choice | a. true, b. false | a |
14,557 | NDQ_017306 | halogens | halogens tend to form compounds with elements in group | null | null | Multiple Choice | a. 1., b. 2., c. 16., d. 18. | a |
14,558 | NDQ_017307 | halogens | all halogens are gases at room temperature. | null | null | Multiple Choice | a. true, b. false | b |
14,559 | NDQ_017308 | halogens | properties of halogens include | null | null | Multiple Choice | a. relatively low melting point., b. ability to conduct electricity., c. ability to conduct heat., d. all of the above | a |
14,560 | NDQ_017315 | hearing and the ear | functions of the ear include | null | null | Multiple Choice | a. gathering sound waves., b. amplifying sound waves., c. changing sound waves to electrical signals., d. all of the above | a |
14,561 | NDQ_017316 | hearing and the ear | all of the following are parts of the outer ear except the | null | null | Multiple Choice | a. pinna., b. ear canal., c. oval window., d. eardrum. | c |
14,562 | NDQ_017317 | hearing and the ear | the main role of the middle ear is to change sound waves to electrical impulses. | null | null | Multiple Choice | a. true, b. false | b |
14,563 | NDQ_017318 | hearing and the ear | the inner ear includes the | null | null | Multiple Choice | a. stirrup., b. cochlea., c. anvil., d. all of the above | b |
14,564 | NDQ_017319 | hearing and the ear | you perceive a sound as soon as the sound waves strike your eardrum. | null | null | Multiple Choice | a. true, b. false | b |
14,565 | NDQ_017324 | hearing loss | the most common cause of hearing loss is | null | null | Multiple Choice | a. loud sounds., b. infections., c. injuries., d. none of the above | a |
14,566 | NDQ_017325 | hearing loss | loud sounds cause loss of hearing by damaging the tiny bones of the middle ear. | null | null | Multiple Choice | a. true, b. false | b |
14,567 | NDQ_017326 | hearing loss | louder sounds damage hearing more quickly than softer sounds. | null | null | Multiple Choice | a. true, b. false | a |
14,568 | NDQ_017327 | hearing loss | hearing loss caused by loud sounds is temporary. | null | null | Multiple Choice | a. true, b. false | b |
14,569 | NDQ_017328 | hearing loss | the permissible exposure time to a 97-decibel sound is | null | null | Multiple Choice | a. 1 minute., b. 4 minutes., c. 30 minutes., d. 4 hours. | c |
14,570 | NDQ_017331 | heat | heat is a form of energy. | null | null | Multiple Choice | a. true, b. false | b |
14,571 | NDQ_017335 | heat | temperature measures the average kinetic energy of particles. | null | null | Multiple Choice | a. true, b. false | a |
14,572 | NDQ_017336 | heat | thermal energy always moves from cooler to warmer substances. | null | null | Multiple Choice | a. true, b. false | b |
14,573 | NDQ_017337 | heat | thermal energy is transferred between two substances until | null | null | Multiple Choice | a. one substance is warmer than the other., b. both substances are warmer than they were., c. both substances are cooler than they were., d. both substances have the same temperature. | d |
14,574 | NDQ_017340 | heat | thermal energy is transferred between substances only when they have different | null | null | Multiple Choice | a. masses., b. volumes., c. temperatures., d. two of the above | c |
14,575 | NDQ_017343 | heat conduction | thermal energy can be transferred by | null | null | Multiple Choice | a. conduction., b. convection., c. radiation., d. all of the above | d |
14,576 | NDQ_017345 | heat conduction | thermal energy is always transferred | null | null | Multiple Choice | a. from a cooler to warmer object., b. from a warmer to cooler object., c. between objects that are the same temperature., d. two of the above | b |
14,577 | NDQ_017346 | heat conduction | only the particles of warm matter are in constant random motion. | null | null | Multiple Choice | a. true, b. false | b |
14,578 | NDQ_017348 | heat conduction | all of the following are examples of heat conduction except | null | null | Multiple Choice | a. pressing a shirt with a hot iron., b. warming your hands by holding a cup of hot chocolate., c. warming your hands over a campfire., d. heating soup in a pan on a stovetop. | c |
14,579 | NDQ_017349 | heat conduction | if you hold an ice cube in your hand, your hand feels really cold because | null | null | Multiple Choice | a. cold is transferred to your hand from the ice cube., b. thermal energy is transferred from your hand to the ice cube., c. thermal energy is transferred to your hand from the ice cube., d. none of the above | b |
14,580 | NDQ_017350 | heat conduction | conduction occurs when particles of matter collide. | null | null | Multiple Choice | a. true, b. false | a |
14,581 | NDQ_017353 | heating systems | a hot-water heating system includes | null | null | Multiple Choice | a. ducts., b. pipes., c. registers., d. two of the above | b |
14,582 | NDQ_017354 | heating systems | in a hot-water heating system, hot water transfers thermal energy to radiators by thermal radiation. | null | null | Multiple Choice | a. true, b. false | b |
14,583 | NDQ_017355 | heating systems | in both hot-water and warm-air heating systems, thermal energy is transferred through the air in each room by conduction. | null | null | Multiple Choice | a. true, b. false | b |
14,584 | NDQ_017356 | heating systems | a warm-air heating system includes | null | null | Multiple Choice | a. ducts., b. pipes., c. registers., d. two of the above | d |
14,585 | NDQ_017372 | hydrocarbons | hydrocarbons are the simplest type of carbon compounds. | null | null | Multiple Choice | a. true, b. false | a |
14,586 | NDQ_017373 | hydrocarbons | hydrocarbon molecules | null | null | Multiple Choice | a. are polar., b. do not dissolve in water., c. are all liquids at room temperature., d. two of the above | b |
14,587 | NDQ_017374 | hydrocarbons | hydrocarbons are used to make | null | null | Multiple Choice | a. fuels., b. waxes., c. fabrics., d. all of the above | d |
14,588 | NDQ_017375 | hydrocarbons | the size of hydrocarbon molecules influences their melting and boiling points. | null | null | Multiple Choice | a. true, b. false | a |
14,589 | NDQ_017376 | hydrocarbons | hydrocarbons consist only of carbon and hydrogen atoms. | null | null | Multiple Choice | a. true, b. false | a |
14,590 | NDQ_017377 | hydrocarbons | saturated hydrocarbons | null | null | Multiple Choice | a. contain only single bonds between carbon atoms., b. contain as many hydrogen atoms as possible., c. are called alkanes., d. all of the above | d |
14,591 | NDQ_017378 | hydrocarbons | what is the general formula for a saturated hydrocarbon? | null | null | Multiple Choice | a. CnH2n+2, b. CnH2n, c. CnH2n-2, d. none of the above | a |
14,592 | NDQ_017381 | hydrogen and alkali metals | elements in group 1 of the periodic table include | null | null | Multiple Choice | a. sodium., b. hydrogen., c. calcium., d. two of the above | d |
14,593 | NDQ_017382 | hydrogen and alkali metals | how many valence electrons do alkali metals have? | null | null | Multiple Choice | a. 1, b. 2, c. 3, d. 4 | a |
14,594 | NDQ_017383 | hydrogen and alkali metals | hydrogen and alkali metals are very reactive. | null | null | Multiple Choice | a. true, b. false | a |
14,595 | NDQ_017384 | hydrogen and alkali metals | the most reactive alkali metal is lithium. | null | null | Multiple Choice | a. true, b. false | b |
14,596 | NDQ_017385 | hydrogen and alkali metals | characteristics of alkali metals include | null | null | Multiple Choice | a. softness., b. high density., c. liquid state at room temperature., d. two of the above | a |
14,597 | NDQ_017388 | hydrogen and alkali metals | the alkali metal named francium is radioactive. | null | null | Multiple Choice | a. true, b. false | a |
14,598 | NDQ_017392 | hydrogen bonding | water is a polar compound. | null | null | Multiple Choice | a. true, b. false | a |
14,599 | NDQ_017396 | hydrogen bonding | hydrogen bonds are very strong bonds. | null | null | Multiple Choice | a. true, b. false | b |
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