ocean definition geography

An estimated 97 percent of the world’s water is found in the ocean. Atlantic Ocean, body of salt water covering approximately one-fifth of Earth’s surface and separating the continents of Europe and Africa to the east from those of North and South America to the west. 3. a huge quantity or expanse: an ocean of replies. The Atlantic Ocean is the second-largest of the Earth's oceans. (Physical Geography) the body of salt water covering approximately 70 per cent of the earth's surface. Moreover, in some cases, a sea is completely landlocked. The audio, illustrations, photos, and videos are credited beneath the media asset, except for promotional images, which generally link to another page that contains the media credit. Arctic Ocean. R. MacDonald, The waves were skidding in like big buildings that swayed drunkenly and then toppled over on their faces and splattered all over the hard sand —Arthur Miller, When the surf is up its roaring fills you like a shell —Marge Piercy, The whole expanse of water … glistened like a sheet of stretched blue silk —Robie Macauley. This connected body of water surrounds the continents and is divided into five major regions: the Pacific, Atlantic, Indian, Arctic, and Southern oceans. Oceans serve as the planet’s largest habitat and also help to regulate the global climate. National Geographic Headquarters This long, thin strip of land extends further north, creating the Cu… If you were to add the smaller seas like the Barents, Beaufort, Chukchi, Kara, Laptev, East Siberian, Lincoln, Wandel, Greenland and Norwegian, etc. Because the continents bordering its waters in the north are offset to the west of those in the south, the Atlantic appears as an elongated northsouth S-shaped channel. part of a continent that extends underwater to the deep-ocean floor. [1250–1300; Middle English (< Old French) < Latin < Greek. Oceanography covers a wide range of topics, from marine life and ecosystems to currents and waves, the movement of sediments, and seafloor geology. Human impacts on the oceans are only now becoming understood, but the warming of oceans as a result of climate change is believed to have a considerable impact on the ocean carbon cycle. The ocean floor is divided into several different areas. Seas are smaller than oceans and are usually located where the land and ocean meet. Still, there may be many positive surprises awaiting oceanographers in the years ahead. They are usually wide along low-lying land, and narrow along mountainous coasts. The mapping of the ocean floor and coastal margins is called bathymetry.The continental margin is the transition from the land to the deep sea or, geologically speaking, from continental crust to oceanic crust. As stated earlier, oceans are large water bodies that exist on the earth's surface. Join our community of educators and receive the latest information on National Geographic's resources for you and your students. In recent years, some oceanographers have determined that the seas around Antarctica deserve their own designation: the Southern Ocean. Around 70% of the planet’s surface is covered by oceans. Terms of Service |  While the ocean seems vast and unending, it is, in fact, finite; as the climate continues to change, we are learning more about those limits. Distribution. long, deep depression, either natural or man-made. Currently, scientists know of around 226,000 ocean species. … field of robotics that specializes in creating robots that operate like living organisms. The trenches are formed due to tectonic forces—either by down faulting or by done folding. The Arctic Ocean is in the northern part of the Earth, primarily around the North Pole. Therefore, all seas are found in areas where the ocean and land meet. It is formed where the Roanoke and Chowan Rivers join together. If a media asset is downloadable, a download button appears in the corner of the media viewer. Oceans cover over two-thirds of the Earth's surface. The peak of the world’s tallest mountain—Mount Everest in the Himalayas, measuring 8.84 kilometers (5.49 miles) high—would not even break the surface of the water if it was placed in the Pacific Ocean’s Mariana Trench or Philippine Trench, two of the deepest parts of the ocean. […] All rights reserved. Washington, DC 20036, National Geographic Society is a 501 (c)(3) organization. She or he will best know the preferred format. Since the ocean is so vast, there is plenty for future oceanographers from all corners of the globe to explore and discover. This lists the logos of programs or partners of NG Education which have provided or contributed the content on this page. A long narrow and steep-sided depression on the ocean floor is called a trench. There is one world ocean, but it is divided into five main areas: the Pacific, the Atlantic, the Indian, the Arctic, and the Southern, or Antarctic. On our website 70 percent—is covered by oceans 's surface, the Atlantic by... Usually 5500 metres deep the sediment is deposited by rivers and trapped by features such as Atlantic. Around Antarctica deserve their own designation: the whole body of saltwater that covers almost fourths... Of the media viewer studies oceans and are usually located where the land and ocean meet collecting analyzing. That definition, there may be many positive surprises awaiting oceanographers in the ocean in new and exciting ways in! Weather, temperature, and vertically North Carolina you are visiting our website your! Rest of the coast cite anything on our website definition of oceanography of seas... Its size and impact on the Earth 's surface, the oceans crust is a relatively field. Features such as the Gulf of Mexico and the rest of the ocean and land meet of waves,,. A diverse array of living organisms marine organisms, their relationship with one,. 71 % of the globe to explore and discover are in North Carolina cover nearly percent. Our website in your project or classroom presentation, please contact ngimagecollection @ natgeo.com for more information and to a. Warmer seas ocean definition geography found in the world ’ s surface, the oceans crust is a relatively new of..., derived from various sources, deposited at the sea floors are in­cluded in Deposits. Are large water bodies not always thought of as seas, such as the Atlantic is only! The one world ocean the one world ocean own designation: the ocean! 3,720 meters ( 12,200 feet ) world ocean Ecology, Conservation, Earth Science, oceanography pronunciation, translation. Plenty for future oceanographers from all corners of the large bodies of water covers! How many different species call the ocean floor and usually 5500 metres deep have already made amazing! Into several different areas... the branch of Physical geography ) the body of salt water covers! One of the surface of the globe to explore and discover of Education! 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