The correct answer is option 4 i.e. In this layer, the temperature rises very rapidly with increasing height.
| Troposphere |
- The troposphere is the lowest part of the atmosphere.
- The troposphere is the part in which we live.
- It contains most of our weather - clouds, rain, snow.
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| Stratosphere |
- The stratosphere is the second most layer of the atmosphere spreading up to the height of about 50 km from the surface of the earth.
- Ideal for flying aircraft.
- It contains much of the ozone in the atmosphere.
- The increase in temperature with height occurs because of the absorption of ultraviolet (UV) radiation from the sun by this ozone.
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| Mesosphere |
- The layer of atmosphere between the stratosphere and thermosphere is known as the mesosphere.
- It lies between 50- 80 km from the surface of the earth.
- The gases are present in ionized form.
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| Exosphere |
- The region above about 500 km is called the exosphere.
- It contains mainly oxygen and hydrogen atoms.
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It is the outermost layer of the atmosphere.
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It is also called a fringe region.
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There is no effect of gravity on this layer.
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| Thermosphere |
- The thermosphere lies above the mesopause and is a region in which temperatures again increase with height.
- This temperature increase is caused by the absorption of energetic ultraviolet and X-Ray radiation from the sun.
- Gas molecules split into ions in this layer. So this layer is known as the ion layer.
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