Multiple choice

What is atmosphere?

  1. Layer of air above the earth's surface

  2. Layer of gases

  3. Air in motion above the earth's surface

  4. Layer of vapours above the earth's surface
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The atmosphere is the layer of gases that surrounds Earth and is held by gravity. It consists mainly of air (nitrogen, oxygen, etc.) extending from the surface upward. While it contains gases and vapours, the best answer is the layer of air above Earth's surface.

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