Nitrogen Cycle and Phosphorus Cycle Review

Front

The process in which nitrogen circulates and is recycled is called

Back

The nitrogen cycle

Front

Gas that makes up 78% of our atmosphere.

Back

Nitrogen

Front

Bacteria fix nitrogen from the atmosphere into a form plants can use.

Back

True

Front

What is the process where bacteria turns Nitrogen gas from the atmosphere into usable compounds?

Back

nitrogen fixation

Front

Can plants and animals use nitrogen directly from the air?

Back

True

Front

What substance used in agriculture is notably responsible for an imbalance in the nitrogen cycle?

Back

fertilizers

Front

Where in the human body is the majority of phosphorus found?

Back

bones

Front

What process in the nitrogen cycle converts nitrogen back into its gaseous state?

Back

denitrification

Front

Which of the following is an example of an anthropogenic effect on the nitrogen cycle?

• Lightning converts atmospheric nitrogen into usable nitrogen.
• The nitrogen in decomposing organisms converts back to ammonia.
• Rain washes excess fertilizer from a farm into a nearby stream.
• Bacteria in nodules on the roots of legumes convert ammonia into nitrates.

Back

Rain washes excess fertilizer from a farm into a nearby stream.

Front

What process refers to the release of phosphorus stored in soil for millions of years?

Back

geological uplifting