Nitrogen Cycle

Front

What is the process of combining nitrogen gas with other elements to make nitrogen into usable compounds?

Back

nitrogen fixation

Front

How much of the atmosphere is composed of nitrogen gas?

Back

78%

Front

Organisms that break down dead plants & animals and release nitrogen back into atmosphere...

Back

bacteria

Front

Organisms that need nitrogen to survive

Back

all living organisms

Front

If the atmosphere is 78% N₂, why can't we just get our nitrogen by breathing?

Back

We have no mechanism to break the triple bond of nitrogen between the atoms.

Front

Can plants and animals use nitrogen directly from the air?

Back

No, they cannot.

Front

What process returns nitrogen from plants and animals back into the atmosphere and soil?

Back

decomposition

Front

Based on this diagram, what is the chemical formula for gaseous nitrogen? Options: N, N₂, N₃, N₄

Back

N₂

Front

What happens when organisms die and decay?

Back

Their nitrogen returns to the soil

Front

The process in which Nitrogen circulates and is recycled is called ____________

Back

The nitrogen cycle