Nutrient cycles activity

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Across
  1. 2. In the past huge does positive carpet restored as dead plants and animals
  2. 4. Plants CO2 in the process of photosynthesis to make what
  3. 6. Phosphorus is not found in the free state in nature, but it is mostly in
  4. 7. Bacteria in the soil can break down the ammonia into the gaseous form of nitrogen.
  5. 9. It is an essential nutrient for life, with a chemicals such as
  6. 11. Higher organisms use nitrogen to make what?
  7. 12. Animals and plants cannot directly use all the nitrogen found in our?
  8. 14. Plants use C02 in the process of this to make sugar
  9. 15. Police special bacteria can directly use nitrogen in our atmosphere and “fix” it Some other organisms can benefit. What are these bacteria called
  10. 16. What is the percentage of the nitrogen gas in our atmosphere?
  11. 19. Too much CO2 in the atmosphere may be responsible for
Down
  1. 1. Animals use oxygen in the process of
  2. 3. fossil fuels/ More CO2 released into the atmosphere
  3. 5. main regulator of CO2
  4. 8. Too much phosphorus in water at least to this in a plant
  5. 10. and nitrate. Animal waste by the action of bacteria, which create a blank and blank products, which nitrogen and useful for plants to use again
  6. 13. A natural source of CO2
  7. 17. Some of the phosphorus is soils can be washed away into what
  8. 18. gases. Today is deposited friend is fossil fuels, which include whole wheel and what else