Carbon and Nitrogen Cycle

Front

What process returns carbon back into the atmosphere when organisms die?

Back

Decomposition

Front

What gas is produced by plants and used by animals?

Back

Oxygen

Front

Which organisms need nitrogen to survive?

Back

All living things

Front

True or False: Bacteria play a very important role in the nitrogen cycle.

Back

True

Front

What is the constant movement of nitrogen through the biotic and abiotic parts of an ecosystem called?

Back

Nitrogen cycle

Front

What is the primary process by which plants convert carbon dioxide into oxygen?

Back

Photosynthesis

Front

What is the role of decomposers in the carbon cycle?

Back

They break down dead organisms, returning carbon to the atmosphere.

Front

What is nitrogen fixation?

Back

The process of converting nitrogen gas from the atmosphere into a form usable by living organisms.

Front

What are the two main types of nitrogen-fixing bacteria?

Back

Free-living bacteria and symbiotic bacteria.

Front

What is the significance of the carbon cycle in ecosystems?

Back

It regulates the flow of carbon among the atmosphere, land, and oceans.