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Nitrogen Cycle

Nitrogen Cycle. What did the Nitrogen molecule call the nerdish Oxygen molecule?. -An Oxymoron. What is Nitrogen?. It is an element. Can be found in many forms and is crucial for all life’s existence Proteins DNA (so it’s a good thing we have it).

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Nitrogen Cycle

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  1. Nitrogen Cycle What did the Nitrogen molecule call the nerdish Oxygen molecule? -An Oxymoron

  2. What is Nitrogen? • It is an element • Can be found in many forms and is crucial for all life’s existence • Proteins • DNA • (so it’s a good thing we have it)

  3. N2 gas is useless to most living organisms Where can we find Nitrogen? • Where is nitrogen most abundant? • In the atmosphere as N2 gas • Makes up 78% of the atmosphere

  4. Losing or Gaining • Nitrogen seems to be collecting in certain areas of our ecosystem (fertilizers)

  5. Where did it come from? • All the nitrogen on Earth has always been there. It has always been recycled in the nitrogen Cycle. • Humans are now taking nitrogen from certain areas and moving it to a different reservoir in the cycle(This can lead to problems)

  6. Eutrophication • Nitrogen helps plants grow (sometimes too much!!!) • Nitrogen can run off into lakes and streams with H20 • Excessive plant/bacteria growth can occur

  7. Excessive bacteria or plant life can us up all the oxygen in the lake and suffocate other aquatic life

  8. The 4 Steps • Nitrogen Fixation Atmosphere N2 NH4 • Decay Dead organic things NH4 • Nitrification NH4useable nitrates (NO2-1) • Denitrofication nitrates (NO2-1) Atmosphere N2

  9. Nitrogen Fixation • N2 gas looks like • Lot’s of energy to break bonds and transform N2 into ammonia NH4 • Lightning • Industry (600 C) • Bacteria • These methods are able to take N2 in the atmosphere and transform it into NH4

  10. NH4 Decay • Living organisms die and their nitrogen gets converted into ammonia with the help of Bacteria

  11. NH4 NO2 Nitrification • Nitrifying Bacteria in the soil convert ammonia to more usable nitrates (NO2-1)

  12. Denitrification • Ultimately nitrogen must be replaced in the atmosphere • Denitrifying bacteria are able to break down

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