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15,000 | NDQ_018586 | surface wave | why do surface waves break along the shore? | null | null | Multiple Choice | a. The waves start to drag on the bottom., b. The tops of the waves speed up., c. The waves become less steep., d. all of the above | a |
15,001 | NDQ_018587 | surface wave | the larger a surface wave is, the more energy the wave has. | null | null | Multiple Choice | a. true, b. false | a |
15,002 | NDQ_018588 | surface wave | an ocean wave carries water all the way across the ocean to the opposite shore. | null | null | Multiple Choice | a. true, b. false | b |
15,003 | NDQ_018591 | synthesis reactions | which of the following is not a synthesis reaction? | null | null | Multiple Choice | a. 2H2 + O2 → 2H2O, b. 2CO + O2 → 2CO2, c. 3H2 + N2 → 2NH3, d. Mg + 2HCl → MgCl2 + H2 | d |
15,004 | NDQ_018593 | synthesis reactions | the chemical equation 2no + o2 2no2 represents a synthesis reaction. | null | null | Multiple Choice | a. true, b. false | a |
15,005 | NDQ_018594 | synthesis reactions | the product of a synthesis reaction can be an element or a compound. | null | null | Multiple Choice | a. true, b. false | b |
15,006 | NDQ_018596 | synthesis reactions | examples of synthesis reactions include | null | null | Multiple Choice | a. 2K + Cl2 → 2KCl, b. Zn + 2HCl → ZnCl2 + H2, c. Cl2 + 2KBr → 2KCl + Br2, d. two of the above | a |
15,007 | NDQ_018601 | technological design constraints | physical constraints on technological design include | null | null | Multiple Choice | a. scientific laws., b. ease of use., c. safety., d. cost. | a |
15,008 | NDQ_018630 | technology and society | technology can have both positive and negative effects on people. | null | null | Multiple Choice | a. true, b. false | a |
15,009 | NDQ_018634 | technology and society | how did the industrial revolution affect society? | null | null | Multiple Choice | a. New cities grew up around factories., b. Living conditions in cities improved., c. Average income decreased., d. Population size decreased. | a |
15,010 | NDQ_018663 | thermal conductors and insulators | thermal conduction occurs more quickly in certain solids and liquids than in gases. | null | null | Multiple Choice | a. true, b. false | a |
15,011 | NDQ_018666 | thermal conductors and insulators | good thermal conductors include | null | null | Multiple Choice | a. aluminum., b. plastic., c. wood., d. two of the above | a |
15,012 | NDQ_018667 | thermal conductors and insulators | when you wear a down jacket, it prevents the transfer of cold from the outside air to your body. | null | null | Multiple Choice | a. true, b. false | b |
15,013 | NDQ_018668 | thermal conductors and insulators | good thermal insulators include | null | null | Multiple Choice | a. air., b. Styrofoam., c. iron., d. two of the above | d |
15,014 | NDQ_018671 | thermal energy | only matter that feels warm has thermal energy. | null | null | Multiple Choice | a. true, b. false | b |
15,015 | NDQ_018673 | thermal energy | the thermal energy of matter depends on its | null | null | Multiple Choice | a. mass., b. temperature., c. number of particles., d. all of the above | d |
15,016 | NDQ_018674 | thermal energy | an object with a lower temperature always has less thermal energy than an object with a warmer temperature. | null | null | Multiple Choice | a. true, b. false | b |
15,017 | NDQ_018675 | thermal energy | which choice has the least thermal energy? | null | null | Multiple Choice | a. cup of hot cocoa, b. bathtub full of warm water, c. swimming pool full of cool water, d. all the water in Earth’s oceans | a |
15,018 | NDQ_018677 | thermal energy | the faster the particles of matter are moving, the greater their kinetic energy is. | null | null | Multiple Choice | a. true, b. false | a |
15,019 | NDQ_018678 | thermal energy | the slower the particles of matter are moving, the lower their temperature is. | null | null | Multiple Choice | a. true, b. false | a |
15,020 | NDQ_018679 | thermal radiation | thermal energy is the total kinetic energy of moving particles of matter. | null | null | Multiple Choice | a. true, b. false | a |
15,021 | NDQ_018683 | thermal radiation | examples of thermal radiation include thermal energy traveling through | null | null | Multiple Choice | a. the air from a campfire to you., b. empty space from the sun to Earth., c. a metal pan to water inside the pan., d. two of the above | d |
15,022 | NDQ_018684 | thermal radiation | no matter is required to transfer thermal energy by | null | null | Multiple Choice | a. conduction., b. convection., c. radiation., d. two of the above | c |
15,023 | NDQ_018685 | thermal radiation | only very hot objects radiate thermal energy. | null | null | Multiple Choice | a. true, b. false | b |
15,024 | NDQ_018688 | thermal radiation | life on earth depends on thermal energy radiated from the sun. | null | null | Multiple Choice | a. true, b. false | a |
15,025 | NDQ_018690 | thomsons atomic model | thomson won a nobel prize for his discovery of protons. | null | null | Multiple Choice | a. true, b. false | b |
15,026 | NDQ_018694 | thomsons atomic model | thomson knew that the particles he discovered were smaller than atoms because of their | null | null | Multiple Choice | a. charge., b. color., c. mass., d. volume. | c |
15,027 | NDQ_018697 | thomsons atomic model | thomson thought that the positive charges in an atom were | null | null | Multiple Choice | a. concentrated in the nucleus., b. clumped into small clusters like plums., c. spread throughout the atom., d. none of the above | c |
15,028 | NDQ_018698 | thomsons atomic model | thomsons research proved daltons earlier claim about the smallest particles of matter. | null | null | Multiple Choice | a. true, b. false | b |
15,029 | NDQ_018699 | transfer of electric charge | all atoms are neutral in electric charge. | null | null | Multiple Choice | a. true, b. false | a |
15,030 | NDQ_018701 | transfer of electric charge | the formation of charged matter always depends on the transfer of electrons. | null | null | Multiple Choice | a. true, b. false | a |
15,031 | NDQ_018702 | transfer of electric charge | ways that matter can become electrically charged include | null | null | Multiple Choice | a. conduction., b. convection., c. radiation., d. all of the above | a |
15,032 | NDQ_018704 | transfer of electric charge | conduction occurs when you | null | null | Multiple Choice | a. touch a van de Graaff generator., b. rub a balloon on your hair., c. reach toward a metal doorknob., d. two of the above. | a |
15,033 | NDQ_018706 | transfer of electric charge | polarization occurs only when there is direct contact between two objects. | null | null | Multiple Choice | a. true, b. false | b |
15,034 | NDQ_018707 | transfer of electric charge | electrons are transferred whenever there is friction between materials that differ in their ability to give up or accept electrons. | null | null | Multiple Choice | a. true, b. false | a |
15,035 | NDQ_018710 | transition metals | of all known elements, transition metals make up about | null | null | Multiple Choice | a. 80 percent., b. 60 percent., c. 40 percent., d. 20 percent. | b |
15,036 | NDQ_018711 | transition metals | transition metals include | null | null | Multiple Choice | a. aluminum., b. barium., c. cobalt., d. all of the above | c |
15,037 | NDQ_018712 | transition metals | which of the following is not a property of most transition metals? | null | null | Multiple Choice | a. malleability, b. ability to conduct electricity, c. ability to conduct heat, d. low melting point | d |
15,038 | NDQ_018715 | transition metals | transition metals are high in density and very hard. | null | null | Multiple Choice | a. true, b. false | a |
15,039 | NDQ_018716 | transition metals | most transition metals are dull and brown in color. | null | null | Multiple Choice | a. true, b. false | b |
15,040 | NDQ_018719 | transverse wave | a mechanical wave is a wave that travels through matter. | null | null | Multiple Choice | a. true, b. false | a |
15,041 | NDQ_018724 | transverse wave | the matter a mechanical wave travels through is called the medium. | null | null | Multiple Choice | a. true, b. false | a |
15,042 | NDQ_018726 | transverse wave | examples of transverse waves include the wave that travels through a | null | null | Multiple Choice | a. guitar string when you pluck it., b. spring toy when you shake it from side to side., c. bungee cord when you shake it up and down., d. all of the above | d |
15,043 | NDQ_018727 | transverse wave | earthquake waves travel in all directions away from the disturbance that causes the earthquake. | null | null | Multiple Choice | a. true, b. false | a |
15,044 | NDQ_018728 | transverse wave | s waves travel through underground rocks. | null | null | Multiple Choice | a. true, b. false | a |
15,045 | NDQ_018730 | types of friction | types of friction include | null | null | Multiple Choice | a. static friction., b. sliding friction., c. rolling friction., d. all of the above | d |
15,046 | NDQ_018732 | types of friction | static friction prevents you from slipping when you walk on a sidewalk. | null | null | Multiple Choice | a. true, b. false | a |
15,047 | NDQ_018733 | types of friction | sliding friction is stronger than static friction. | null | null | Multiple Choice | a. true, b. false | b |
15,048 | NDQ_018737 | types of friction | factors that affect the amount of friction against an object moving through the air include the objects | null | null | Multiple Choice | a. speed., b. weight., c. temperature., d. two of the above | a |
15,049 | NDQ_018738 | types of friction | when you put on the brakes of your bike, the wheels stop turning. then friction between the wheels and the road slows your bike to a stop. which type of friction is this? | null | null | Multiple Choice | a. fluid friction, b. static friction, c. sliding friction, d. rolling friction | c |
15,050 | NDQ_018743 | ultrasound | some animals use echolocation to find prey. | null | null | Multiple Choice | a. true, b. false | a |
15,051 | NDQ_018745 | ultrasound | sonar is used to determine the | null | null | Multiple Choice | a. speed of motor vehicles., b. distance to underwater objects., c. location of approaching storms., d. all of the above | b |
15,052 | NDQ_018746 | ultrasound | you can calculate distance from speed and time with the equation | null | null | Multiple Choice | a. Distance = Speed/Time., b. Distance = Time/Speed., c. Distance = Speed x Time., d. none of the above | c |
15,053 | NDQ_018747 | ultrasound | the speed of sound waves through ocean water is 1437 m/s. assume that ultrasound waves take 2 seconds to travel from a sonar device on a ship to the bottom of the water and back to the ship again. how deep is the water? | null | null | Multiple Choice | a. 2874 m, b. 1437 m, c. 718 m, d. none of the above | b |
15,054 | NDQ_018748 | ultrasound | the use of reflected ultrasound waves to create images of organs inside the body is called ultrasonography. | null | null | Multiple Choice | a. true, b. false | a |
15,055 | NDQ_018752 | unsaturated hydrocarbons | the smallest alkene is methene. | null | null | Multiple Choice | a. true, b. false | b |
15,056 | NDQ_018753 | unsaturated hydrocarbons | smaller alkenes are gases at room temperature. | null | null | Multiple Choice | a. true, b. false | a |
15,057 | NDQ_018754 | unsaturated hydrocarbons | which statement about aromatic hydrocarbons is true? | null | null | Multiple Choice | a. They have only single bonds., b. They have branched-chain shapes., c. They have strong scents., d. two of the above | c |
15,058 | NDQ_018756 | unsaturated hydrocarbons | alkynes are very common in nature. | null | null | Multiple Choice | a. true, b. false | b |
15,059 | NDQ_018757 | unsaturated hydrocarbons | which chemical formula represents an alkyne? | null | null | Multiple Choice | a. CH4, b. C2H6, c. C2H4, d. C2H2 | d |
15,060 | NDQ_018759 | using earths magnetic field | earth has north and south magnetic poles like a bar magnet. | null | null | Multiple Choice | a. true, b. false | a |
15,061 | NDQ_018762 | using earths magnetic field | how does earths magnetic field protect the planet? | null | null | Multiple Choice | a. It holds the atmosphere in place., b. It deflects solar winds., c. It protects Earth’s organisms from radiation., d. two of the above | d |
15,062 | NDQ_018763 | using earths magnetic field | there would be no northern lights without the magnetosphere. | null | null | Multiple Choice | a. true, b. false | a |
15,063 | NDQ_018764 | using earths magnetic field | animals that use earths magnetic field for navigation include | null | null | Multiple Choice | a. loggerhead turtles., b. migratory birds., c. humans., d. all of the above | d |
15,064 | NDQ_018766 | using earths magnetic field | people have only recently started using earths magnetic field for determining direction. | null | null | Multiple Choice | a. true, b. false | b |
15,065 | NDQ_018767 | using earths magnetic field | some birds may be able to sense earths magnetic field lines as a visual pattern. | null | null | Multiple Choice | a. true, b. false | a |
15,066 | NDQ_018770 | valence electrons | valence electrons tend to be attracted by the nuclei of other atoms as much as, or more than, the nucleus of their own atom. | null | null | Multiple Choice | a. true, b. false | a |
15,067 | NDQ_018772 | valence electrons | all the elements in the same period of the periodic table have the same number of valence electrons. | null | null | Multiple Choice | a. true, b. false | b |
15,068 | NDQ_018773 | valence electrons | what is the maximum number of valence electrons an element may have? | null | null | Multiple Choice | a. 6, b. 8, c. 10, d. 12 | b |
15,069 | NDQ_018774 | valence electrons | when a group 1 element reacts it | null | null | Multiple Choice | a. gains two electrons., b. loses two electrons., c. gains one electron., d. loses one electron. | d |
15,070 | NDQ_018775 | valence electrons | which element would you expect to gain one electron in a chemical reaction? | null | null | Multiple Choice | a. chlorine, b. oxygen, c. nitrogen, d. carbon | a |
15,071 | NDQ_018781 | velocity | velocity is a vector. | null | null | Multiple Choice | a. true, b. false | a |
15,072 | NDQ_018782 | velocity | if you represent velocity with an arrow, the length of the arrow represents | null | null | Multiple Choice | a. speed., b. distance., c. direction., d. acceleration. | a |
15,073 | NDQ_018784 | velocity | the si unit for velocity is km/h. | null | null | Multiple Choice | a. true, b. false | b |
15,074 | NDQ_018786 | velocity time graphs | the steepness of a line graph is called its slope. | null | null | Multiple Choice | a. true, b. false | a |
15,075 | NDQ_018789 | velocity time graphs | if a velocity-time graph is horizontal, then velocity is | null | null | Multiple Choice | a. increasing., b. decreasing., c. not changing., d. accelerating. | c |
15,076 | NDQ_018790 | velocity time graphs | in the graph described in question 5, acceleration is | null | null | Multiple Choice | a. zero., b. positive., c. less than 1., d. none of the above | a |
15,077 | NDQ_018792 | velocity time graphs | in the graph in question 8, acceleration between seconds 2 and 4 is 10 m/s. | null | null | Multiple Choice | a. true, b. false | b |
15,078 | NDQ_018796 | visible light and matter | a clear image is produced by diffuse reflection. | null | null | Multiple Choice | a. true, b. false | b |
15,079 | NDQ_018797 | visible light and matter | regular reflection occurs when the reflective surface is very smooth. | null | null | Multiple Choice | a. true, b. false | a |
15,080 | NDQ_018799 | visible light and matter | when light passes from one medium into another it may | null | null | Multiple Choice | a. change direction., b. change speed., c. be refracted., d. all of the above | d |
15,081 | NDQ_018801 | visible light and matter | when light is absorbed, it transfers its energy to matter. | null | null | Multiple Choice | a. true, b. false | a |
15,082 | NDQ_018802 | visible light and matter | what happens to light that strikes transparent matter? | null | null | Multiple Choice | a. It is reflected., b. It is absorbed., c. It is transmitted., d. none of the above. | c |
15,083 | NDQ_018804 | visible light and matter | matter is opaque if it | null | null | Multiple Choice | a. absorbs light., b. reflects light., c. transmits light., d. two of the above | d |
15,084 | NDQ_018807 | vision and the eye | the sclera is the opaque, white, outer covering of the eye. | null | null | Multiple Choice | a. true, b. false | a |
15,085 | NDQ_018808 | vision and the eye | the lens is the only structure in the eye that focuses light. | null | null | Multiple Choice | a. true, b. false | b |
15,086 | NDQ_018809 | vision and the eye | which of the following statements about the cornea is false? | null | null | Multiple Choice | a. It is transparent., b. It helps focus light., c. It helps protect the eye., d. none of the above | d |
15,087 | NDQ_018810 | vision and the eye | which structure controls the amount of light that enters the eye? | null | null | Multiple Choice | a. retina, b. lens, c. pupil, d. none of the above | c |
15,088 | NDQ_018811 | vision and the eye | the membrane lining the back of the eye is the | null | null | Multiple Choice | a. cornea., b. sclera., c. retina., d. optic nerve. | c |
15,089 | NDQ_018813 | vision and the eye | rods are nerve cells that sense different colors of light. | null | null | Multiple Choice | a. true, b. false | b |
15,090 | NDQ_018817 | vision problems and corrective lenses | the vision problem called myopia is also called farsightedness. | null | null | Multiple Choice | a. true, b. false | b |
15,091 | NDQ_018818 | vision problems and corrective lenses | in myopia, images focus | null | null | Multiple Choice | a. in front of the retina., b. behind the retina., c. above the retina., d. on the retina. | a |
15,092 | NDQ_018819 | vision problems and corrective lenses | the vision problem called hyperopia is also called nearsightedness. | null | null | Multiple Choice | a. true, b. false | b |
15,093 | NDQ_018820 | vision problems and corrective lenses | in hyperopia, the eyeball is | null | null | Multiple Choice | a. longer than normal., b. shorter than normal., c. smaller than normal., d. larger than normal. | b |
15,094 | NDQ_018826 | wave amplitude | all waves that travel through matter are called | null | null | Multiple Choice | a. longitudinal waves., b. mechanical waves., c. transverse waves., d. surface waves. | b |
15,095 | NDQ_018827 | wave amplitude | the matter a wave travels through is called the material of the wave. | null | null | Multiple Choice | a. true, b. false | b |
15,096 | NDQ_018828 | wave amplitude | the more energy a wave has, the farther the particles of matter move. | null | null | Multiple Choice | a. true, b. false | a |
15,097 | NDQ_018829 | wave amplitude | the position of a particle of matter in the absence of a wave is called the | null | null | Multiple Choice | a. trough., b. midline., c. resting position., d. normal location. | c |
15,098 | NDQ_018833 | wave amplitude | a wave with greater energy has a larger amplitude. | null | null | Multiple Choice | a. true, b. false | a |
15,099 | NDQ_018834 | wave amplitude | in all mechanical waves, particles of the medium move up and down when the wave passes through them. | null | null | Multiple Choice | a. true, b. false | b |
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