What is photosynthesis?

Animals breathe in oxygen and release carbon dioxide during ____.

What is the name of the process that burns fossil fuels?

Carbon dioxide is continuously being dissolved in the ocean through the process of_____/

____________ are compounds that are made of nitrogen and oxygen.

The process of converting nitrogen into nitrates that organisms can use is called _____.

What do plants do with the nitrates they absorb?

Organisms that break down dead plants and animals and release nitrogen into the atmosphere are called

Which organisms need nitrates to survive?

Which cycle includes photosynthesis and respiration?

The cycling of carbon between the living and non-living parts of the Earth system is an important part of which process?

Which cycle included bacteria?

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