destiny's puzzle (4A)

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Across
  1. 4. nitrogen is important to animals by
  2. 8. water that falls from atmosphere
  3. 9. living organisms on the planet
  4. 11. carbon moves from atmosphere to plants
  5. 13. water 3% is
  6. 15. carbon moves from living thing to
  7. 16. form commonly used by plants
  8. 17. air surrounds earth
  9. 20. water stored under surface of earth
Down
  1. 1. water is changed back into liquid water
  2. 2. all water on earth
  3. 3. occurs because of heat from sun
  4. 5. carbon moves from plants to animals
  5. 6. can be converted into forms usable for plants & animals
  6. 7. divided into how many spheres?
  7. 10. plants use water to help make energy
  8. 12. carbon moves from plants and animals to
  9. 14. always been present on earth
  10. 18. what water can become
  11. 19. 97% is