Nitrogen Cycle

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Across
  1. 3. nitrogen converted to ammonia or ammonium by bacteria
  2. 6. reverse of nitrogen fixation; nitrates converted to nitrogen gas, which is diffused back into the atmosphere
  3. 7. chemical processes by which atmospheric nitrogen is assimilated into organic compounds, especially by certain microorganisms as part of the nitrogen cycle (but also by lightning strikes).
  4. 9. is a repeating cycle of processes during which nitrogen moves through both living and nonliving things: the atmosphere, soil, water, plants, animals and bacteria In order to move through the different parts of the cycle, nitrogen must change forms.
  5. 10. N, atomic number 7
Down
  1. 1. Nitrogen from food is incorporated into living organisms
  2. 2. nitrogen from living organisms (either their bodies or their excretions) is broken down (typically by bacteria or fungi) and converted to ammonium (ammonification)
  3. 4. Fixation Nitrification Ammonification Assimilation Denitrification
  4. 5. ammonium/ammonia converted to usable nitrogen by plants
  5. 8. a series of events that are regularly repeated in the same order.