Nitrogen Cycle & Phosphorus Cycle

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Across
  1. 2. fixed-nitrogen that turns back into gas ends up in the ______.
  2. 6. phosphorus goes into the soil and is absorbed by plants
  3. 10. Chemicals which people use to stimulate and maximize plant growth, containing both nitrogen and phosphorus are known as...
  4. 11. gas that makes up 78% of the atmosphere
  5. 13. breaks down dead organic matter and releases phosphorus and nitrogen into the soil
  6. 14. turns solid nitrates back into nitrogen gas
  7. 15. majority of dead zones are found on the _______.
Down
  1. 1. wearing down of rocks
  2. 3. nitrous oxide mixes with oxygen to form ______.
  3. 4. how excess fertilizer gets into the waters
  4. 5. where the nitrogen-fixing bacteria are found
  5. 7. rocks reform
  6. 8. what kind of bloom do excess fertilizers make
  7. 9. dead organisms are broken down and released into the soil
  8. 12. most abundant form of nitrogen
  9. 14. Nitrogen is an important part of this genetic material.