Ocean

An ocean (from Ancient Greek Ὠκεανός, transc. Okeanós, the sea of classical antiquity[1]) is a body of saline water that composes much of a planet's hydrosphere.[2] On Earth, an ocean is one of the major conventional divisions of the World Ocean, which occupies two-thirds of the planet's surface. These are, in descending order by area, the Pacific, Atlantic, Indian, Southern, and Arctic Oceans.[3][4] The word sea is often used interchangeably with "ocean" in American English but, strictly speaking, a sea is a body of saline water (generally a division of the world ocean) partly or fully enclosed by land.[5] Earth's global ocean[edit] Global divisions[edit] Various ways to divide the World Ocean The major oceanic divisions are defined in part by the continents, various archipelagos, and other criteria. Physical properties[edit] The bluish color of water is a composite of several contributing agents. Zones with depth[edit] The major oceanic divisions Exploration[edit] Climate[edit] Biology[edit]

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