General Science Review 7.1

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

What percentage of Earth's atmosphere is nitrogen and oxygen?

What 2 molecules are usually found in groups of 2 atoms?

Other gasses in the atmosphere are called _______ gasses because they are only found in small amounts

Earth's atmosphere is

Living things use atmosphere to

What describes the condition of air at a particular time and place?

What is ozone?

Pure air contains