EARTH SCIENCE
OCEANS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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land that drops down at the edge of the continental shelf
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chains of mountains that run through an ocean basin
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wide and flat areas with a thick layer of sediment
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narrow and steep sided clefts in the ocean floor
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Detailed explanation-1: -A long narrow, steep-sided depression on the ocean floor is called oceanic trench. Oceanic trenches are also called deep-sea trenches. They usually get formed in locations where a tectonic plate gets subducted under another plate. The deepest oceanic trench is the Mariana Trench .
Detailed explanation-2: -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.
Detailed explanation-3: -Trenches are long, narrow depressions on the seafloor that form at the boundary of tectonic plates where one plate is pushed, or subducts, beneath another.
Detailed explanation-4: -Deep-sea trench A long, narrow depression on the deep sea floor, related to tectonic plate movement, specifically subduction zones.
Detailed explanation-5: -Every such deepest part of the ocean is referred to as deep trenches. They are known as the hadal zone, and the deepest sea trenches are created by shifting tectonic plates.