The Nitrogen Cycle

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Across
  1. 3. – break down dead organisms and return nitrogen to soil
  2. 6. – organisms that absorb nitrogen through roots
  3. 9. – where nitrogen gas is found in the air
  4. 12. – materials organisms need to grow and survive
  5. 13. – element needed to build proteins and DNA
Down
  1. 1. – where nitrogen becomes available for plants
  2. 2. – molecules built using nitrogen, made by ribosomes
  3. 4. – process where matter moves and is reused
  4. 5. – part of plants that absorb nutrients from soil
  5. 7. – get nitrogen by eating plants or other animals
  6. 8. – organisms that help change nitrogen into usable forms
  7. 10. – group of decomposers like mushrooms
  8. 11. – molecule that contains genetic information and uses nitrogen