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  1. Ocean - Wikipedia

    For practical and historical reasons, it is customary to divide the World Ocean into a set of five major oceans. By convention these are the Pacific, Atlantic, Indian, Arctic, and Southern (Antarctic) oceans.

  2. How Many Oceans Are There In The World? - WorldAtlas

    Feb 19, 2025 · Roughly 71 percent of Earth’s surface is covered by saltwater oceans, and the continents themselves hold lakes, rivers, and, in some instances, seas. The largest bodies of water are the …

  3. Ocean | Definition, Distribution, Map, Formation, & Facts | Britannica

    Nov 17, 2025 · An ocean is a continuous body of salt water that is contained in an enormous basin on Earth’s surface. The major oceans and their marginal seas cover nearly 71 percent of Earth’s …

  4. What are the 5 Oceans of the World? - Earth How

    Nov 9, 2017 · Since the year 2000, the International Hydrographic Organization (IHO) started recognizing 5 oceans: Pacific, Atlantic, Indian, Arctic and Southern Ocean.

  5. Oceans—facts and information | National Geographic

    The vast bodies of water surrounding the continents are critical to life on Earth. But overfishing and global warming threaten to leave oceans barren.

  6. All About the Ocean - National Geographic Society

    May 27, 2025 · Although the ocean is one continuous body of water, oceanographers have divided it into five principal areas: the Pacific, Atlantic, Indian, Arctic, and Southern Oceans.

  7. How many oceans are there? - NOAA's National Ocean Service

    Jun 16, 2024 · Historically, there are four named oceans: the Atlantic, Pacific, Indian, and Arctic. However, most countries - including the United States - now recognize the Southern (Antarctic) as …

  8. Map of the Oceans: Atlantic, Pacific, Indian, Arctic, Southern

    Map of Earth's Five Oceans: Although there is only one global ocean, geographers have divided it into five major regions (which are also called "oceans"). They are: the Atlantic Ocean, the Pacific Ocean, …

  9. Earth’s Oceans: Their Role, Environments, and Importance

    Jul 24, 2025 · Earth has five major oceans: the Pacific, Atlantic, Indian, Southern (or Antarctic), and Arctic. The Pacific Ocean is the largest and deepest, with an average depth of 4,280 meters and its …

  10. 1.1 Overview of the Oceans – Introduction to Oceanography

    We often think of Earth in terms of its land area, but in reality 71% of the Earth’s surface is covered by oceans, while only 29% is land. Oceans cover an area of 139 million miles 2 or 361 million km 2, and …