2A - Victoria Coward

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Across
  1. 7. carbon moves from plant to animal or animal to animal by the ____ chain
  2. 10. has always been present on earth/all plants and animals need this
  3. 13. dead plants and animals decomposing, and nitrogen is converted by a process called
  4. 14. all the water on earth
  5. 16. 97% of earths water is ____water
  6. 17. nitrate is returned to the atmosphere
  7. 18. all the organisms on earth
  8. 19. water stored under the surface of earth
  9. 20. a large body of water
Down
  1. 1. the process of plants converting energy into food
  2. 2. the process where water is converted into gas
  3. 3. forms of rain and snow
  4. 4. also known as co2
  5. 5. plants use water to help make energy, and they also lose some water to the surrounding air
  6. 6. the process where water vapor is changed into water
  7. 8. plants need nitrogen to ____
  8. 9. earth is 3% _____ water
  9. 11. all the rocks on earth
  10. 12. bacteria and ________ break nitrogen bonds
  11. 13. when you exhale you put co2 into the __________
  12. 15. also known as the hydrologic cycle