Nitrogen Cycle

Front

What is the formula for atmospheric nitrogen?

Back

N₂

Front

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

Back

Through action of bacteria and lightning.

Front

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

Back

It represents the gaseous form of nitrogen (N₂) present in the atmosphere.

Front

Which organisms need nitrogen to survive?

Back

All living things.

Front

True or False: Bacteria fix nitrogen from the atmosphere into a form plants can use.

Back

True.

Front

What is nitrogen fixation?

Back

The process of converting nitrogen gas (N₂) from the atmosphere into ammonia (NH₃) or related compounds in soil.

Front

What role do legumes play in the nitrogen cycle?

Back

Legumes host nitrogen-fixing bacteria in their root nodules, helping to convert atmospheric nitrogen into a usable form.

Front

What is the significance of nitrification in the nitrogen cycle?

Back

Nitrification is the process where ammonia (NH₃) is converted into nitrites (NO₂⁻) and then into nitrates (NO₃⁻), which plants can absorb.

Front

What is denitrification?

Back

The process by which nitrates (NO₃⁻) are converted back into nitrogen gas (N₂), returning nitrogen to the atmosphere.

Front

What is the role of decomposers in the nitrogen cycle?

Back

Decomposers break down organic matter, releasing nitrogen back into the soil in the form of ammonia.