Unit 4: Nitrogen Cycle Independent Practice

Front

Plants and animals need nitrogen to make __________.

Back

Protein

Front

Identify the cycle pictured.

Back

The Nitrogen cycle

Front

According to this diagram, plants use nitrogen to make _________________________

Back

proteins

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 is the role of nitrogen-fixing bacteria in the nitrogen cycle?

Back

They convert atmospheric nitrogen (N₂) into ammonia (NH₃), which plants can use.

Front

What is the process by which plants absorb nitrogen?

Back

Plants absorb nitrogen in the form of nitrates (NO₃⁻) or ammonium (NH₄⁺).

Front

What is denitrification?

Back

Denitrification is the process by which bacteria convert nitrates back into nitrogen gas (N₂), returning it to the atmosphere.

Front

What is the significance of the nitrogen cycle in ecosystems?

Back

The nitrogen cycle is essential for recycling nitrogen in the ecosystem, which is crucial for plant growth and overall ecosystem health.

Front

What are the main forms of nitrogen found in the soil?

Back

The main forms of nitrogen in the soil are ammonium (NH₄⁺) and nitrate (NO₃⁻).