• If you had to draw the boundaries of the Earth's oceans on a map, would you be able to? The answer is no—because there is really only one "world ocean." Oceanographers have divided the world ocean into four principal areas, or basins: the Pacific, Atlantic, Indian, and Arctic Ocean basins. The Atlantic, Indian, and Pacific Ocean basins merge into icy waters around Antarctica. Some oceanographers define this as a fifth ocean, usually called the Antarctic or Southern Ocean basin.

    This video focuses on the Atlantic Ocean basin and is taken from the interactive online game, My Ocean. Test your ocean knowledge and learn about the different basins of the world ocean by playing here.

    • The Atlantic Ocean is the second-largest ocean in the world.
    • The Atlantic Ocean was named after Atlas, a character from Greek mythology who supported the heavens on his shoulders.
    • The Atlantic Ocean is, on average, the world's saltiest ocean.
  • Term Part of Speech Definition Encyclopedic Entry
    Atlantic Ocean Noun

    one of Earth's four oceans, separating Europe and Africa from North and South America.

    magma Noun

    molten, or partially melted, rock beneath the Earth's surface.

    Encyclopedic Entry: magma
    Mid-Atlantic Ridge Noun

    underwater mountain range that runs from Iceland to Antarctica.

    penguin Noun

    bird native to the Antarctic.

    polar bear Noun

    large mammal native to the Arctic.

    tectonic plate Noun

    large, moveable segment of the Earth's crust.

    whale Noun

    largest marine mammal species.

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