Where does Photosynthesis get the carbon dioxide it needs?

Beside Carbon Dioxide, what other gas is a greenhouse gas?

Which gas dissolves in the ocean and is used in Photosynthesis for aquatic plants?

Which of the following statements is true about carbon and carbon dioxide?

List three ways that cause carbon to be released into the atmosphere as carbon dioxide?

How is carbon dioxide used in the ocean?

How much of our atmosphere is made up of nitrogen gas?

Nitrogen is important in the formation of _______. (Pick 3)

We can breathe in nitrogen from the air and use it just like we use oxygen.

How do we get nitrogen into our bodies?

The nitrogen cycle includes ___________. (Pick 3)

Pick 2 ways that nitrogen in the atmosphere enters the soil.

Where does nitrogen goes once it is in the soil?

What process of the nitrogen cycle occurs in the roots of plants?

What lives in the roots of plants that fix the nitrogen so that plants can use the nitrogen?

What part of the roots are these nitrogen fixing bacteria found?

What is the general name given to the bacteria that fix nitrogen so that plants can use the nitrogen?

_________ can also fix nitrogen gas for plants.

Animals get nitrogen by ____________.

_____________ bacteria change the nitrates back into nitrogen gas that is then released back into the atmosphere.

Certain bacteria and fungi called ________ convert nitrogen in dead plants and animals into ammonia.