The condition of Earth's atmosphere at a particular time and place.

The layer of gases that surrounds the planet.

What does Earth's atmosphere do to allow us to live here?

What is the most abundant gas in the atmosphere at 78%?

What is the second most abundant gas in the atmosphere at 21%?

Which gas helps us grow and repair damaged cells?

Which gas do we use to release energy from our food?

A form of oxygen that has 3 atoms instead of the usual 2 atoms

What gives off carbon dioxide as a waste product?

Water in the form of a gas is called...

What are the 4 main gases that make up the atmosphere?

What converts nitrogen into nitrates?

Without the atmosphere what would Earth look like?

What is responsible for nearly all of the oxygen in the atmosphere?

What does ozone in the upper atmosphere help absorb?

Which layer of the atmosphere holds most of our ozone?

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