World climates

Geography (CDS) CDS Exam

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The four layers of the atmosphere are-

1. Ionosphere

2. Mesosphere

3. Stratosphere

4. Troposphere

Their correct ascending order in terms of height is?

1, 2, 3, 4

4, 3, 2, 1

4, 3, 1, 2

2, 1, 4, 3

Explanation:

Atmosphere is a layer or a set of layers of gases surrounding a planet or other material body, that is held in place by the gravity of that body. An atmosphere is more likely to be retained if the gravity it is subject to is high and the temperature of the atmosphere is low. The atmosphere of Earth is composed of nitrogen (about 78%), oxygen (about 21%), argon (about 0.9%), carbon dioxide (0.04%) and other gases in trace amounts.

By: ANIVESH KUMAR

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