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| Q. |
Cloudy nights are wanner compared nights, because clouds mainly – |
| A. | Absorb heat from the atmosphere send it towards earth |
| B. | Prevent cold waves from the sky descending on earth |
| C. | Reflect back the heat given by earth |
| D. | Produce heat and radiate it toward earth |
| Answer» C. Reflect back the heat given by earth | |
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Explanation: It is because the night side of Earth will radiate infra-red radiation (heat) back into space. When there is cloud cover, the clouds act like a blanket and trap the heat close to the ground just like a blanket traps heat close to our body. |
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