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About 70 percent of the Earth's surface is water-covered.
The oceans hold about 96.5 percent of all Earth's water.
If all of Earth's water (oceans, icecaps and glaciers, lakes, rivers, ground water, and water in the atmosphere was put into a sphere, then the diameter of that water ball would be about 1,385 km’s across, a bit more than the distance between Salt Lake City, Utah to Topeka, Kansas.
About 12,900 km3 of water, mostly in the form of water vapour, is in the atmosphere at any one time. If it all fell as precipitation at once, the Earth would be covered with only about 1 inch of water.
Each day, 1,170 km3 of water evaporate or transpire into the atmosphere.
Of the freshwater on Earth, much more is stored in the ground than is available in lakes and rivers. More than 8,400,000 km3 of freshwater is stored in the Earth, most within one-half mile of the surface.
All information sourced from http://ga.water.usgs.gov/edu/earthhowmuch.html
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