Question

3. Envelope of gases surrounding earth is called Atmosphere.​

Answer 1

The atmosphere is the thin envelope of gas molecules surrounding the Earth; it is held down by Earth's gravitational pull. The atmosphere is concentrated at the Earth's surface and rapidly thins as you move upward, blending with space at about 100 miles above sea level.

Answer 2

Explanation:

The atmosphere is the layer of oxygen gas that surrounds the earth.