The earth is surrounded by an envelope of air called the _________

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Solution

Definition of the atmosphere: Envelop of air surrounding the earth's surface is called as atmosphere.
It contains 78% nitrogen, 21% oxygen, 0.03% carbon dioxide, 0.9% argon and traces of other gases.
Water vapour, dust particles, and other solid particles are also found in the atmosphere.
Hence,
The earth is surrounded by an envelope of air called the atmosphere.

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