Nitrogen & Phosphorous Cycle Review

What would happen to the nitrogen cycle if all soil bacteria died?

• No nitrogen gas could be converted to a form plants can use.

• All nitrogen would become nitrate permanently.

• All nitrogen would become nitrate permanently.

Label the following processes in the nitrogen cycle diagram (1-4):

assimilation

denitrification

nitrification

ammonification

d

c

b

a

nitrification

denitrification

ammonification

assimilation

Correctly order the steps of the nitrogen cycle in an aquaponic system

• plant proteins

• nitrite

• nitrate

• fish food

• ammonia

Which of these is most likely to happen when fertilizer washes off a farm field?

• denitrification

• uplifting

• europhication

Label the following processes in the diagram:

assimilation

uplifting

weathering

sedimentation

b

a

c

d

sedimentation

assimilation

weathering

uplifting