The ocean contains 97% of Earth's water [8] and is the primary component of Earth's hydrosphere, acting as a huge reservoir of heat for Earth's energy budget, as well as for its carbon cycle and water cycle, forming the basis for climate and weather patterns worldwide.
The ocean covers 70 percent of Earth 's surface. It contains about 1.35 billion cubic kilometers (324 million cubic miles) of water, which is about 97 percent of all the water on Earth.
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 oceans, but there is some ongoing discussion regarding the actual number of separate oceans.
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 surface, with an average depth of 3,688 metres (12,100 feet).
The ocean covers about 70% of Earth’s surface and contains 97% of its water. Data collected by NASA’s Earth observing instruments help scientists understand how Earth’s ocean supports a vast diversity of life and the role it plays in influencing global temperature, weather patterns, climate, and food supply.
Consider the size of the ocean. Its surface area is about 360 million square kilometers (139 million square miles), and its average depth is 3,682 meters (12,080 feet). Throughout these depths, there is life. Despite its importance, the majority of our ocean is largely unknown.
Approximately 71 percent of the Earth’s surface is covered by oceans, making it the dominant feature of our planet. This vast expanse of saltwater profoundly influences weather patterns, supports an incredible diversity of life, and plays a critical role in regulating the Earth’s climate.
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 contain a volume of about 1.37 billion km 3 of water.
Just How Big Is the Ocean? The ocean, which we often break into five large ocean basins, covers 71 percent of the Earth's surface and holds over 1.3 billion cubic km of water.
Oceans cover about 70 percent of the Earth's surface and about 97 percent of all water on and in the Earth is saline—there's a lot of salty water on our planet.
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