Topic 5 Vocabulary Quiz

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Across
  1. 2. harmful substance.
  2. 3. Fuels materials that formed as ancient plants and animals decayed underground.
  3. 5. an object that converts energy for human use with circular motion.
  4. 7. Energy Energy obtained from beneath Earth’s surface.
  5. 10. Gas a pollutant that increases the atmosphere’s ability to hold heat.
  6. 12. an unstable element used by humans as an energy source.
  7. 15. a device that reduces the amount of pollutants that get into the air.
  8. 16. Fuel an energy source made from unstable elements.
Down
  1. 1. is something made for a particular purpose.
  2. 2. a liquid fossil fuel formed by the decay of ancient plants and animals.
  3. 4. Gas a fossil fuel that occurs in the gas state.
  4. 6. stores chemical energy and can convert that energy into electrical energy.
  5. 8. Using energy of moving water.
  6. 9. a solid fossil fuel that is burned to transfer energy.
  7. 10. a device that changes energy of motion into electrical energy.
  8. 11. the release of substances into the environment.
  9. 13. is a material that releases energy as heat when it burns.
  10. 14. the process of burning fuel to produce heat and light.