A sea is the expanse of salt water that covers most of the earth's surface and surrounds its land masses and an ocean isĀ a very large expanse of sea, in particular each of the main areas into which the sea is divided geographically.
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Many people use the terms "ocean" and "sea" interchangeably when speaking about the ocean, but there is a difference between the two terms when speaking of geography (the study of the Earth's surface).Seas are smaller than oceans and are usually located where the land and ocean meet. Typically, seas are partially enclosed by land.
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