Ecology

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Across
  1. 2. when you switch the fields you grow your crops in each year to avoid nutrient loss
  2. 5. using falling water to create energy by creating dams
  3. 8. using old products to create new products
  4. 10. the rise in our earth's temperature
  5. 12. solid fossil fuel
  6. 14. anything we use for energy besides fossil fuels
  7. 15. a resource that cannot be replaced at the rate we use it
  8. 16. type of nonrenewable resource that forms from the remains of things that lived long ago
  9. 17. using sunlight to create electrical energy
  10. 19. a nonrenewable alternative energy which involves fission and fusion of uranium
  11. 21. big downside of alternative energy because we need equipment to use it
  12. 22. reliable and ____ are the advantages of fossil fuels
Down
  1. 1. using heat inside the earth the generate electricity
  2. 3. anything formed in nature that humans use for economic gain
  3. 4. using the ocean's water to power electricity
  4. 6. a resource that can be replaced at the rate we use it
  5. 7. uneven heating of air
  6. 9. saving and protecting our resources
  7. 11. type of air pollution created by burning fossil fuels
  8. 13. liquid fossil fuel also known as petroleum
  9. 18. a gas that traps heat in our atmosphere like carbon dioxide
  10. 20. using organic material for energy