Energy Sources

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Across
  1. 5. harmful substance
  2. 6. device that spins to convert heat energy into kinetic energy
  3. 8. the process of burning fuel to produce heat and light
  4. 9. heat that comes from beneath the earth's surface
  5. 12. energy that comes from plants (like firewood)
  6. 14. material found in rocks that was used in nuclear fuel
  7. 15. result
  8. 17. original
  9. 18. materals that formed underground as plants and animals decay
  10. 20. a pollutant that increases the earth's ability to hold heat
Down
  1. 1. a fossil fuel that is a hard black substance
  2. 2. a liquid fossil fuel
  3. 3. a device to store chemical energy
  4. 4. a fossil fuel that occurs in the gas state
  5. 7. produces nuclear energy
  6. 10. energy from moving water
  7. 11. something made for a specific purpose
  8. 13. a material that releases energy as heat as it burns
  9. 16. the release of substances into the environment
  10. 19. device that changes kinetic energy to electrical energy