Energy Unit Review

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Across
  1. 4. energy resources that are not readily replaced, and depleted when used
  2. 8. energy created from burning organic matter
  3. 9. energy resources that are not depleted when used
  4. 11. natural gas and oil were created by prehistoric ___________ plants and animals
  5. 13. energy created by using heat within the Earth
  6. 15. method for obtaining liquid fossil fuels
  7. 16. it cannot produce more energy than it uses is the main disadvantage of this type of energy
Down
  1. 1. almost all energy sources must turn a _________ in order to produce electricity
  2. 2. this material used for energy was created from the pressurized remains of dead swamp plants
  3. 3. burning fossil fuels largely contributes to
  4. 5. material used for energy formed from prehistoric dead plants and animals
  5. 6. contaminating groundwater is the main reason people oppose this type of energy
  6. 7. the most widely used energy resource in the US
  7. 10. the cleanest burning fossil fuel
  8. 12. the element split in order to create nuclear energy
  9. 14. the ability to do work