Question

what is atmosphere?
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Answer 1

Answer:

An atmosphere is a layer of gas or layers of gases that envelope a planet or other material body, which is held in place by the gravity of that body. A planet retains an atmosphere when the gravitational force is high and the temperature of the atmosphere is low.

Explanation:

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Answer 2

Answer:

Atmosphere is the thin layer of air that surrounds the earth. It is made up of various gases such as oxygen, nitrogen, carbon dioxides, dust particles and water vapour. The gravitational force of the earth holds the atmosphere around it. It protects us from harmful rays and scorching heat of the sun.