Nitrogen Cycle
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Last updated 3:23 PM on 2/4/25
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6 Terms
1
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Percentage of atmosphere that nitrogen occupies
78%
2
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Nitrogen fixation
bacteria convert N2 (atmospheric nitrogen) into NH3 (ammonia)
3
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Nitrification
NH3 →NO2- (nitrite) → NO3- (nitrate)
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Assimilation
plants root take up NH3, NH4+ (ammonium ion) and NO3- and convert into complex organic molecules
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Ammonification
decomposers break down complex organisms into NH3 and NH4+
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Dentrification
bacteria convert NH3 and NH4+ into NO2- and NO3- and then into N2 and N2O (nitrous oxide)
Note 
Flashcards (20)