Nitrogen Cycle Flashcard

Front

What do plants absorb from the soil in the nitrogen cycle?

Back

Nitrates.

Front

What gas makes up 78% of our atmosphere?

Back

Nitrogen.

Front

From where do animals obtain proteins in the nitrogen cycle?

Back

From eating plants.

Front

How is nitrogen 'fixed' into a usable form for plants?

Back

Through the action of bacteria and lightning.

Front

What does nitrogen in the atmosphere represent in the nitrogen cycle?

Back

It is a key component that is converted into usable forms for living organisms.

Front

What role do nitrogen-fixing bacteria play in the nitrogen cycle?

Back

They convert atmospheric nitrogen into nitrates that plants can absorb.

Front

What is the process called when nitrogen gas is converted into ammonia?

Back

Nitrogen fixation.

Front

What is the significance of decomposers in the nitrogen cycle?

Back

They break down organic matter, returning nitrogen to the soil in the form of ammonium.

Front

What is the term for the conversion of nitrates back into nitrogen gas?

Back

Denitrification.

Front

What is the primary source of nitrogen for plants?

Back

Nitrates in the soil.