EARTH SCIENCE
OCEANS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It is very flat and very deep.
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It is warm and shallow, and contains the most life.
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It is caused by underwater volcanoes.
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It has a very steep drop, like a ski slope.
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Detailed explanation-1: -The term ‘abyssal plain’ refers to a flat region of the ocean floor, usually at the base of a continental rise, where slope is less than 1:1000. It represents the deepest and flat part of the ocean floor lying between 4000 and 6500 m deep in the U.S. Atlantic Margin.
Detailed explanation-2: -Abyssal plains consist of beds of volcanic rock topped with sediments that are up to thousands of feet thick. Most of the sediments wash off the continents, and are carried to the depths by dense currents. Over time, the sediments spread out to provide a smooth, level surface.
Detailed explanation-3: -At depths of over 10, 000 feet and covering 70% of the ocean floor, abyssal plains are the largest habitat on earth. Sunlight does not penetrate to the sea floor, making these deep, dark ecosystems less productive than those along the continental shelf. But despite their name, these “plains” are not uniformly flat.
Detailed explanation-4: -Ocean trenches are long, narrow depressions on the seafloor. These chasms are the deepest parts of the ocean-and some of the deepest natural spots on Earth.