Nitrogen Cycle #1

Front

What do all living things need to survive?

Back

Nitrogen

Front

How do animals obtain nitrogen?

Back

From the food they eat

Front

What is the main reservoir of nitrogen in the environment?

Back

Atmosphere

Front

Can plants and animals use nitrogen directly from the air?

Back

No, they cannot.

Front

Which organisms are responsible for breaking down dead plants and animals to release nitrogen?

Back

Bacteria

Front

What process converts atmospheric nitrogen into a form usable by plants?

Back

Nitrogen fixation

Front

What role do legumes play in the nitrogen cycle?

Back

They host nitrogen-fixing bacteria in their root nodules.

Front

What is denitrification?

Back

The process by which bacteria convert nitrates back into nitrogen gas.

Front

What is ammonification?

Back

The process of converting organic nitrogen from dead organisms into ammonia.

Front

What is nitrification?

Back

The process of converting ammonia into nitrites and then nitrates.