*An immense or boundless expanse of something. Also (hyperbolically): a very great or indefinite quantity
*An immense or boundless expanse of something. Also (hyperbolically): a very great or indefinite quantity
==Description==
==Description==
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An '''ocean''' (from [[Greek]] Ωκεανός, Okeanos (Oceanus)) is a major body of saline water, and a principal component of the [http://en.wikipedia.org/wiki/Hydrosphere hydrosphere]. Approximately 71% of the [[Earth]]'s [[surface]] (~3.61 X 1014 m2) is covered by ocean, a continuous body of water that is customarily divided into several principal oceans and smaller seas.
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An '''ocean''' (from [[Greek]] Ωκεανός, Okeanos (Oceanus)) is a major body of saline water, and a principal component of the [https://en.wikipedia.org/wiki/Hydrosphere hydrosphere]. Approximately 71% of the [[Earth]]'s [[surface]] (~3.61 X 1014 m2) is covered by ocean, a continuous body of water that is customarily divided into several principal oceans and smaller seas.
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More than half of this area is over 3,000 metres (9,800 ft) deep. Average oceanic salinity is around 35 parts per thousand (ppt) (3.5%), and nearly all seawater has a salinity in the range of 30 to 38 ppt. [[Scientists]] estimate that 230,000 marine life forms of all [[types]] are currently known, but the [[total]] could be up to 10 times that [[number]].[http://en.wikipedia.org/wiki/Ocean]
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More than half of this area is over 3,000 metres (9,800 ft) deep. Average oceanic salinity is around 35 parts per thousand (ppt) (3.5%), and nearly all seawater has a salinity in the range of 30 to 38 ppt. [[Scientists]] estimate that 230,000 marine life forms of all [[types]] are currently known, but the [[total]] could be up to 10 times that [[number]].[https://en.wikipedia.org/wiki/Ocean]