The Nitrogen Cycle Flashcards
1
Q
Define nitrification:
A
The process by which ammonium compounds are converted into nitrites and nitrates
2
Q
Define denitrification
A
The conversion of nitrates to nitrogen gas
3
Q
Define nitrogen fixation
A
The incorporation of nitrogen gas into organic nitrogen containing compounds
4
Q
What are the 3 ways nitrogen can be fixed?
A
- lightning
- fixation by microorganisms
- production of ammonia by the Haber process
5
Q
Where do denitrifying bacteria get the oxygen needed for respiration?
A
From nitrates
6
Q
What do denitrifying bacteria release as a waste product?
A
Nitrogen gas
7
Q
In what form do plants take up nitrogen?
A
Nitrates
8
Q
Define ammonification
A
The conversion of nitrogen compounds in dead organic matter or waste into ammonium compounds by decomposers
