Unit 1 Nitrogen Cycle Flashcards
1
Q
Nitrogen fixation
A
Process that converts nitrogen gas in the atmosphere into forms of nitrogen that producers can use
2
Q
Nh3
A
Ammonia
3
Q
No3
A
Nitrate
4
Q
Biotic fixation
A
Bacteria converts n2 (gas) directly into ammonia
5
Q
Abiotic fixation
A
Lightning converts n2 to nitrate which is carried to the surface through precipitation
6
Q
Nitrification
A
Soil bacteria converting Ammonia to nitrite (no2-) and then nitrate no3-
7
Q
Assimilation
A
Producers take up nitrogen from the soil through their roots in the form of ammonia
8
Q
Ammonification
A
Decomposers convert waste and dead biomass back into nh3 and return it to soil
9
Q
Denitrification
A
Conversion of nitrate to nitrous oxide n2o and eventually n2
