Practice Quiz

NAEP Science Grade 8 - Question List

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6. Which of the following best explains why the pressure inside a high-flying airplane must be controlled?
  1. At high altitudes there is greater atmospheric pressure than on the surface of the Earth.
  2. At high altitudes there is lower atmospheric pressure than on the surface of the Earth.
  3. If the cabin is not pressurized, ozone and other upper atmospheric gases will enter the airplane.
  4. If the cabin is not pressurized, carbon dioxide will escape from the airplane.
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7. Which layer of Earth is divided into plates?
  1. Mantle
  2. Crust
  3. Inner core
  4. Outer core
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8. Household appliances convert electricity into one or more different forms of energy. An electric fan can best be described as converting electricity into
  1. heat energy only
  2. heat energy and sound energy only
  3. heat energy, sound energy, and mechanical energy only
  4. heat energy, sound energy, mechanical energy, and chemical energy
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9. An unusual type of fossil clam is found in rock layers high in the Swiss Alps. The same type of fossil clam is also found in the Rocky Mountains of North America. From this, scientists conclude that
  1. glaciers carried the fossils up the mountains
  2. the Rocky Mountains and the Swiss Alps are both volcanic in origin
  3. clams once lived in mountains, but have since evolved into sea-dwelling creatures
  4. the layers of rocks in which the fossils were found are from the same geologic age
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10. A human CANNOT survive the loss of which of the following?
  1. The appendix
  2. The liver
  3. A lung
  4. A kidney
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