Earth's Resources

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Across
  1. 3. a gas that contributes to the warming of the Earth
  2. 5. a device that generate electricity usually by transforming mechanical energy
  3. 7. wet alternative energy resource
  4. 9. a renewable resource used to produce energy
  5. 14. bright alternative energy resource
  6. 15. airy alternative energy resource
  7. 17. anything in nature that people need or find useful
  8. 18. a form of precipitation that kills trees and fish
  9. 20. A nonrenewable resource that is burned to produce energy
  10. 21. a chunk of material found in the ground
Down
  1. 1. one of the factors that change organic material into petroleum
  2. 2. a resource that expended when used
  3. 4. a spinning machine that transforms energy from a fluid into work
  4. 6. a renewable resource in the air that people need to live
  5. 8. one of the factors that change organic material into petroleum
  6. 10. a resource that is not expended when used or is easily replaced
  7. 11. a mixture found in nature of metal and other materials
  8. 12. the efficient use of resources
  9. 13. the real name for what is commonly called "oil"
  10. 16. contaminants in the environment
  11. 19. a sturdy biological resource used to produce heat or build structures