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Write in brief about mean sea level. |
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Answer» 1. The average of the highest high tide and the lowest low tide is considered to calculate the mean sea level. 2. This average is considered to be zero sea level. 3. The altitude of any place above the sea level is measured and expressed in positive value. (For example, Mount Everest is 8848 metres high.) 4. The depth of any place below the sea level is measured and expressed in negative value. (For example, Mariana Trench is 11034 metres below sea level.) |
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