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  1. 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 …

  2. 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 …

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

    5 days ago · 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 …

  4. 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 …

  5. 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.

  6. Oceans—facts and information | National Geographic

    May 3, 2021 · The vast bodies of water surrounding the continents are critical to life on Earth. But overfishing and global warming threaten to leave oceans barren.

  7. Why researchers are racing to study the world's ocean : NPR

    Jul 21, 2025 · Scientists are far from knowing all of the complexities of Earth's ocean. With this comic, we explore some of what scientists do know, like its role as one of the world's largest …

  8. 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 …

  9. 7 Oceans Of The World - Sigma Earth

    Aug 9, 2024 · The 7 oceans of the world, which blanket more than 70% of our Earth’s surface and contain 97% of its water, are very essential to the health of our planet and to human survival.

  10. How Many Oceans Are There? - HowStuffWorks

    Nov 17, 2023 · Humans have gotten into the habit of separating the one big, continuous, mysterious body of water that covers the globe into sectors that we call oceans. Historically, …