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    Sea - Wikipedia

    A sea is a large body of salty water. There are particular seas and the sea. The sea commonly refers to the ocean, the wider body of seawater. Particular seas are either marginal seas, second-order sections of the oceanic sea (e.g. the Mediterranean Sea), or certain large, nearly landlocked bodies of water. The salinity of … See more

    The sea is the interconnected system of all the Earth's oceanic waters, including the Atlantic, Pacific, Indian, Southern and Arctic Oceans. However, the word "sea" can also be used for… See more

    Earth is the only known planet with seas of liquid water on its surface, although Mars possesses ice caps and similar planets in other solar systems may have oceans. Earth's 1,335,000,000 cubic kilometers (320,000,000 cu mi) of sea contain about 97.2See more

    The environmental issues that affect the sea can loosely be grouped into those that stem from marine pollution, from over exploitation and … See more

    Life in the sea image
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    Physical science image

    The oceans are home to a diverse collection of life forms that use it as a habitat. Since sunlight illuminates only the upper layers, the… See more

    History of navigation and exploration
    Humans have travelled the seas since they first built sea-going craft. … See more

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  2. SEA

  3. Ocean - Wikipedia

  4. Ocean facts! - National Geographic Kids

  5. Sea - National Geographic Society

  6. sea
    NOUN
    (the sea)
    sea (noun) · seas (plural noun) · Sea (noun)
    1. the expanse of salt water that covers most of the earth's surface and surrounds its land masses:
      "a ban on dumping radioactive wastes in the sea" ·
      "rocky bays lapped by vivid blue sea" · "a sea view"
    ORIGIN
    Old English sǣ, of Germanic origin; related to Dutch zee and German See.
    SEA
    ABBREVIATION
    More about sea
  7. People also ask
    The word "sea" can also be used for many specific, much smaller bodies of seawater, such as the North Sea or the Red Sea. There is no sharp distinction between seas and oceans, though generally seas are smaller, and are often partly (as marginal seas) or wholly (as inland seas) bordered by land.
    en.wikipedia.org/wiki/Ocean
    A sea can also be very warm for most of the year. The Red Sea, for instance, has an average temperature of around 30 degrees Celsius (86 degrees Fahrenheit). It is also the saltiest sea, containing 41 parts of salt per 1,000 parts of seawater. Seas can be quite cold, too.
    www.nationalgeographic.org/encyclopedia/sea/
    "Freedom of the seas" is a principle in international law dating from the seventeenth century. It stresses freedom to navigate the oceans and disapproves of war fought in international waters. Today, this concept is enshrined in the United Nations Convention on the Law of the Sea (UNCLOS), the third version of which came into force in 1994.
    en.wikipedia.org/wiki/Sea
    A sea can be more than 2.6 million square kilometers (1 million square miles) in area, such as the Caribbean Sea. Or, it can be as tiny as the Sea of Marmara, which is less than 12,950 square kilometers (5,000 square miles) in area. This tiny Turkish sea connects the Aegean Sea and the Black Sea. A sea can also be very warm for most of the year.
    www.nationalgeographic.org/encyclopedia/sea/
  8. Explore oceans - BBC Bitesize

  9. World's Seas - National Geographic Society

  10. All About the Ocean - National Geographic Society

  11. Ocean habitat - National Geographic Kids

  12. Oceans | Natural History Museum

    web23 August 2023. Oceans. Sea urchins: Strange and spiny wonders of the ocean. Sea urchins can be found in every ocean on Earth. They’ve been around for 450 million years - but are they now at risk? Oceans. A deep …