Practice Quiz

NAEP Science Grade 12 - Question List

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6. Which of the following is the chemical formula for an element?
  1. H 2O
  2. NaCl
  3. Cl 2
  4. NH 3
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7. A planetary model of a system, such as the models of the Solar System and the atom discussed here, is appropriate whenever the components of the system and the nature of the forces between them have certain properties. Which of the following might be some of these properties?
  1. One of the components is much more massive than the others and exerts an attractive force on each of the other components.
  2. One of the components is much more massive than the others and exerts a force on each of the other components that is perpendicular to the line connecting their centers.
  3. All the components are equally massive, are far apart, and attract each other.
  4. All the components are equally massive, are close together, and repel each other.
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8. Air in the atmosphere continuously moves by convection. At the equator, air rises; at the poles, it sinks. This occurs because
  1. the Earth's ozone layer is thinner at the equator than at the poles
  2. the Earth's magnetic field is stronger at the poles than at the equator
  3. warm air can hold less water vapor than can cold air
  4. warm air is less dense than cold air
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9. A 10-liter sample of CO 2 gas contains the same number of molecules as how many liters of O 2 gas at the same temperature and pressure?
  1. 5 liters
  2. 10 liters
  3. 20 liters
  4. 30 liters
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10. During the time in the Earth's history when the first amphibians appeared, which of the following was one of the major groups of plants that dominated the land habitats?
  1. Cone-bearing trees (gymnosperms)
  2. Flowering plants (angiosperms)
  3. Ferns
  4. Algae
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