Environmental Science Chapter 7 Test

Match it! Select the correct answer from the pull down...Good luck!

The Earth's atmosphere is made up of _____ layers.

Which gas is used by plants for photosyntesis and released by all living things during cellular respiration?

Since 1958, the amount of carbon dioxide in the atmosphere has:

Which of the following gases makes up most of the atmosphere?

The thin layer of gases that surrounds the earth is the:

Living things could not exist on land until the process of _____ evolved.

The carbon dioxide in the atmosphere helps keep in:

The part of the atmosphere that contains the ozone layer is the: