The Earth as the Water Planet
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Featured Field of Study: SCIENCE
Featured Topic: The Earth as the Water Planet
Why is Earth referred to as the Water Planet? How much do you know about the water on earth?
Fact:
Seventy percent of the surface area of the Earth is covered by interconnected bodies of water. The total land area on the Earth’s surface is about 510 million square kilometers and about 360 million square kilometers of it are covered by oceans and seas. It has been estimated that for every square kilometer of land there are nearly 8 square kilometers of water. Most of the water on Earth is found in the great oceans.
Scientists estimate that there are about 1.5 billion cubic kilometers of water. About 93 percent of this water is in oceans and seas. The remaining 7 percent is in lakes, swamps, rivers, glaciers, underground water, and in the atmosphere. About 0.6 percent fresh water is underground and only about 0.05 percent of the world’s total water is available as fresh water.
-from Books (Integrated Science): Cortes, L. P. (et. al.)
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