Cycles: Carbon, Nitrogen, Phosphorus

Front

What happens to carbon when humans burn fossil fuels?

Back

Most of the carbon quickly enters the atmosphere as carbon dioxide.

Front

Which of the following is NOT a part of the phosphorus cycle?

Back

Atmospheric phosphate.

Front

If the plant population decreased, what would happen to the amount of carbon?

Back

The amount of carbon would increase.

Front

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

Back

Through the action of bacteria and lightning.

Front

What is released by the weathering of rocks?

Back

Phosphorus.

Front

Define the carbon cycle.

Back

The carbon cycle is the process by which carbon is exchanged among the atmosphere, land, water, and living organisms.

Front

What role do plants play in the carbon cycle?

Back

Plants absorb carbon dioxide during photosynthesis, helping to reduce atmospheric carbon levels.

Front

What is nitrogen fixation?

Back

Nitrogen fixation is the process of converting nitrogen gas from the atmosphere into ammonia or related compounds in soil.

Front

What are the main reservoirs of phosphorus in the environment?

Back

The main reservoirs of phosphorus are sedimentary rocks, soil, and water bodies.

Front

How do humans impact the nitrogen cycle?

Back

Humans impact the nitrogen cycle through the use of fertilizers, which can lead to excess nitrogen in ecosystems.