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| Q. |
The moon is showing its same face to the earth because – |
| A. | It is not rotating about its own axis |
| B. | Its rotation and revolution are opposite |
| C. | Its periods of rotation and revolution are the same |
| D. | Its rotation is faster than its revolution |
| Answer» C. Its periods of rotation and revolution are the same | |
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Explanation: Because it is "tidally-locked" to the Earth. The Earth's gravity slows down the moon's rotation, so that it rotates at the same speed as it revolves around the Earth. Imagine a person who walks around a center pole, but shifts their body so they are always facing it as they walk. |
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