Coastal and Oceanic Landform ( 34. Ocean)

                                                                                                                                         Back to Coastal and Oceanic Landform

  • An ocean is a body of saline water.
  • It composes a large part of a planet's hydrosphere.
  • World Ocean –

               1.Pacific Ocean        =  Separates Asia & Oceania from the Americas
              2.Atlantic Ocean       =  Separates  the Americas from Eurasia & Africa
              3.Indian Ocean        =   Washes upon southern Asia & separates Africa &  Australia
             4.Southern Ocean    =   Pacific, Atlantic &  Indian Oceans encircles Antarctica
            5.Arctic Ocean           =   Covers Arctic & washes northern North America & Eurasia

  • The word "sea" is used interchangeably with "ocean".
  • Ocean is the largest confirmed surface.
  • Approximately 72% is covered by saline water.
  • Hydrosphere in the Earth, the ocean contains 97% of the Earth's water.
  • Only 5% of the ocean as a whole in Earth has been explored.
  • The world ocean is part of the carbon cycle.
  • An average depth of 3,682 metres (12,080 ft).
  • It is the habitat of 230,000 known species.
  • Oceans may also exist on exoplanets and exomoons.

  • The area of the World Ocean is 361 million square kilometres.
  • The deep ocean cover about 66% of the Earth's surface.
  • The deepest point in the ocean is the Mariana Trench (10,971 m ), located in the Pacific Ocean near the Northern Mariana Islands.

  • The ocean has a significant effect on the biosphere.
  • Oceanic evaporation.
  • Ocean temperatures determine.
  • climate &  wind patterns that affect life on land.

Lifeforms native to the ocean include:
  • Fish
  • Radiata

  • Cetacea 

  • Cephalopods

  • Crustaceans

  • Marine worms
  • Plankton
  • Echinoderms
                             brittle stars
                            sea cucumbers
                            sand dollars

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