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| Q. |
Which of the following options correctly explains the term heat budget? |
| A. | It is a mode of transfer of heat through matter by molecular activity. |
| B. | It is the balance between incoming and outgoing radiation. |
| C. | It is the radiation from the earth in the form of long waves. |
| D. | It is the amount of heat which the surface of earth receives from the sun. |
| Answer» B. It is the balance between incoming and outgoing radiation. | |
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Explanation: Incoming heat being absorbed by the Earth, and outgoing heat escaping the Earth in the form of radiation are both perfectly balanced. If they were not balanced, then Earth would be getting either progressively warmer or progressively cooler with each passing year. This balance between incoming and outgoing heat is known as Earth's heat budget. |
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