nitrogen cycle Flashcards
1
Q
what is nitrogen needed for
A
making proteins for growth
2
Q
how do plants get nitrogen
A
nitrates from soil
3
Q
how do animals get nitrogen
A
eating plants or each other
4
Q
nitrogen fixating bacteria
A
turning N2 from the air into nitrates in soil
5
Q
lightning
A
energy makes nitrogen react with oxygen to get nitrates in soil
6
Q
decomposition
A
proteins and urea into ammonium ions in the soil
7
Q
nitrifying bacteria
A
amonium ions in decaying matter into nitrates
8
Q
denitrifying bacteria
A
turns nitrates back into N2 in air
