Conservation

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Across
  1. 3. animals are known as
  2. 4. to keep unchanged
  3. 6. helped create America's National Parks
  4. 8. also know as the atmosphere
  5. 10. no longer found on this planet
  6. 11. also known as ecosystem
  7. 13. a scientist who studies nature
  8. 16. living things that are the same
  9. 17. 26th President
Down
  1. 1. takes 100 years to decompose
  2. 2. to move from one place to another
  3. 3. a person who works to protect the environment
  4. 4. plants as known as
  5. 5. someone who travels to find new places
  6. 7. the area where all living things live
  7. 9. all living things
  8. 12. wood, oil, air, soil, are examples of this word
  9. 14. to protect the environment from harm or change
  10. 15. to break down