Changes

*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==

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.

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.

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]

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]

[[Category: Earth Science]]

[[Category: Earth Science]]