Natural Resources

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Across
  1. 4. alternative energy that uses falling water
  2. 6. energy from the sun
  3. 8. coal is considered a ________ resource
  4. 10. fossil fuels are a more popular source of energy because they're _____.
  5. 13. renewable resources do not cause ___________
  6. 14. solar energy is ________
Down
  1. 1. an increase in green house gasses affects the earth's _______
  2. 2. materials in the environment that are useful to people
  3. 3. energy from living or once-living things
  4. 5. a resource that cannot be easily replaced is a __________ resource
  5. 7. another word for petroleum
  6. 9. how we obtain our fossil fuels
  7. 11. coal, natural gas, and petroleum
  8. 12. energy produced by the heat within Earth