Submarine Reliefs — Flashcards

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Hydrosphere is the vast expanse of water on the earth. About 71% of the earth's surface is covered by water.

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An ocean is the great mass of salt water surrounding the land masses of the globe. A sea is a specific area of salt water, usually on the margins of the continents.

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Earth has such a large quantity of water that many scholars call it the Watery Planet. It is the only planet in the solar system with such a large quantity of water.

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The relief of the ocean floor is largely due to the interaction of tectonic, volcanic, erosional, and depositional processes.

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The four major divisions are continental shelf, continental slope, continental rise, and abyssal plain.

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The continental shelf is a slightly inclined, inundated zone that forms the border of a continent. Its slope is less than 1 degree and its maximum depth is normally 200 metres.

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The continental shelf is important because sunlight can reach it, helping marine organisms and vegetation grow. It provides rich fishing grounds and is also important for petroleum, gas, sand, and gra…

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The continental shelf covers about 7.5% of the world's ocean area. Its width varies greatly, from being almost absent in the eastern Pacific to 1,287 km off the Arctic coast of Siberia.