Nitrogen Cycle Review

Front

What gas makes up 78% of our atmosphere?

Back

Nitrogen.

Front

Do all plants have nitrogen-fixing bacteria in their roots?

Back

False.

Front

What form of nitrogen is released when plants and animals decompose?

Back

Ammonium.

Front

What organisms break down remains into chemicals containing carbon and nitrogen?

Back

Decomposers.

Front

What is the process called where bacteria and lightning convert nitrogen gas into usable compounds for plants?

Back

Nitrogen fixation.

Front

What is nitrogen fixation?

Back

The process of converting nitrogen gas into ammonia or related compounds in soil, making it available for plants.

Front

What role do decomposers play in the nitrogen cycle?

Back

They break down dead organisms, releasing nitrogen back into the soil as ammonium.

Front

What is ammonium?

Back

A form of nitrogen that plants can absorb and use for growth.

Front

What is the difference between nitrates and nitrites?

Back

Nitrates (NO3-) are more stable and preferred by plants, while nitrites (NO2-) are intermediate products in the nitrogen cycle.

Front

What is denitrification?

Back

The process by which bacteria convert nitrates back into nitrogen gas, releasing it into the atmosphere.