cycles in nature

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Author:
rhaugen
ID:
187823
Filename:
cycles in nature
Updated:
2012-12-07 15:41:56
Tags:
science
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Description:
science
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  1. What is the nitrogen cycle?
    The nitrogen
  2. what are two forms of nytragen that plants and animals can use?
  3. Where can nytrogen be found?
  4. How can nytragen be fixed?
  5. Carbon-oxygen cycle?
  6. What is resperation?
  7. The cycle of carbon and oxygen through the envirment depens on what two processes?
  8. What area on Earth contains 90%of the orginisioms that get their food through photosynthisis?
  9. ____________________ is when theplants change sunlight into food and oxygen for animals.
  10. Orginisims in the ocean take in ______________________ and release what?
  11. All ocean orginisoms use oxygen and release carbon dioxide  during
  12. Petroleum is created by?
  13. During resperations what is realeased?
  14. The release of carbon dioxide and
  15. Solar Energy
  16. Oxegen is used inthe burning, or _______________, of fuels sutch as coal.

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