What Is An Ocean?

    Published: 06-16-2009
    Views: 12,142
    Science expert Emerald Robinson explains what an ocean is and how the body of water affects our planet.

    Emerald Robinson: Hi! My name is Emerald Robinson. And in this What is video we'll take a look at Earth's biggest body of water the Ocean. The Ocean can be defined as any other large body of slat water that cover in total over 70% of the earth, because all of these bodies are connected there are technically only one big ocean on earth.

    Geographers have divided this world ocean into by five smaller Oceans, these five are in order from biggest to smallest. The Pacific ocean, the Atlantic Ocean, the Indian Ocean, the Antarctic ocean or Southern Ocean and the Artic Ocean.

    The oceans are divided into three zones base on depth, the top 650 feet, the depth to which sunlight penetrate is called the photic zone, anything deeper than 650 feet is called the Aphotic zone. The Benthic zone is the ocean floor which averages above 12,000 feet from the surface but it is added to maximum that in the Mariana Trench about 36,000 Feet deep.

    The Oceans are also divided into three zone based on distances from the Shore. The Intertidial Zone the Shore that is wet or dry based on high and low to high tides. The Neritic Zone which covers there Continental Shelf and the Oceanic Zone which is Open Ocean, because 92% of the earth water is in it's oceans they are the primary source of the water vapor that eventually falls to earth has precipitation.

    Oceans also keep a temperature of the planet with an unlivable range, circulating warm air from each the Equator towards the artic poles. Oceans provide habitats for some of the most diverse forms of life on Earth from tiny oxygen producing algae to the largest blue whales.

    Simply put, life would not be possible on earth without its Oceans.