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Why does the total volume of …

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Why does the total volume of water avilable on earths always remain constant?
  • 1 answers

Meghna Thapar 5 years, 5 months ago

The amount of water on the Earth is constant, or nearly so. Actually, the amount is increasing ever so slightly due to volcanic eruptions expelling water vapor into the atmosphere, but, for all practical purposes, the amount of water (as a gas, liquid and as snow and ice) can be considered to be constant. The world's oceans are rising due to the distribution of water: snow and ice on land, on average, are melting, and that water ultimately ends up in the oceans. The total amount of water is essentially unchanged, but more of it is finding its way from land into the oceans. Secondarily, the world's oceans are warming, and water expands slightly as it is heated, adding to the volume of the oceans.

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