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Nitrogen Cycle

Nitrogen Cycle. Nitrogen . Most abundant element in the atmosphere 78% of the air we breathe is N ₂. Nitrogen Reservoirs. Atmosphere Plants Animals Soil. Nitrogen. All living things contain nitrogen! Building block of amino acids, proteins and DNA. Nitrogen.

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Nitrogen Cycle

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  1. Nitrogen Cycle

  2. Nitrogen • Most abundant element in the atmosphere • 78% of the air we breathe is N₂

  3. Nitrogen Reservoirs • Atmosphere • Plants • Animals • Soil

  4. Nitrogen • All living things contain nitrogen! • Building block of amino acids, proteins and DNA

  5. Nitrogen • Organisms cannot use Atmospheric nitrogen (N₂) • N₂ has to become “fixed” so organisms can use it

  6. Nitrogen Fixation 1.Biological: Bacteria and fungi • Bacteria forms a mutualistic relationships with plants

  7. Nitrogen Fixation 2. Atmospheric: Lightning • Lightning has enough energy to break the bonds in N₂ creating NO₂

  8. Nitrogen Fixation 3. Industrial: Fertilizer • Ammonia is formed under high pressure

  9. Haber - Bosch • German scientists who developed fertilizer • Same process created chemical warfare

  10. Chemical Warfare • WWI 15,000 died in 1st battle • Mustard gas

  11. Usable: Ammonia: NH3 Ammonium: NH₄ Nitrates: NO₃ • Unusable: Atmospheric: N₂ Nitrites: NO₂ • LIFE ON EARTH DEPENDS ON BACTERIA AND FUNGI THAT TRANSFORM NITROGEN INTO USEABLE FORMS • Plants cannot use atmospheric nitrogen N₂ • Animals must get their nitrogen from eating plants and other animals

  12. Ammonification • The process of converting atmospheric nitrogen (N₂) to ammonia NH3and ammoniumNH₄ • N₂  NH3 OR NH₄

  13. Nitrification • The process of converting ammonia NH3 or ammonium NH₄ to nitrites NO₂ or nitrates NO₃ • NH3OR NH₄  NO₃ OR NO₂

  14. Denitrification • The process of converting nitrates NO₃ or nitrites NO₂ into atmospheric nitrogen N₂ • NO₃ OR NO₂  N₂

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