Nitrogen Cycle

Front

Which chemical formula represents the nitrogen in the atmosphere? Options: NH4, NO3, NO4, N2, N2O4

Back

N2

Front

What living organisms play an important role in helping nitrogen change states in the soil? Options: Reptiles, Algae, Mammals, Bacteria, Fish

Back

Bacteria

Front

Which process in the nitrogen cycle turns dead plants and animals into ammonium?

Back

Ammonification

Front

Which process in the nitrogen cycle turns ammonium into nitrates?

Back

Nitrification

Front

Which process in the nitrogen cycle takes extra nitrogen from the soil and puts it back into the air?

Back

Denitrification

Front

Which process in the nitrogen cycle turns nitrogen into ammonium? Options: Fixation, Nitrification, Assimilation, Ammonification, Denitrification

Back

Fixation

Front

Which process in the nitrogen cycle occurs when plants absorb nitrogen from nitrates in the soil? Options: Fixation, Nitrification, Assimilation, Ammonification, Denitrification

Back

Assimilation

Front

In what way is nitrogen important to life on Earth?

Back

All of the above.

Front

True or False - Human activities such as nitrogen fertilizer can upset the balance of the nitrogen cycle.

Back

True

Front

Around what percentage of the Earth's atmosphere is nitrogen?

Back

78%