write briefly about the topography of the ocean floor
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Answer:
The water surface of the ocean is smooth, their bottom topography is very rough. The way mountains, hills, plateaus, plain etc. make the topography of the lithosphere rugged, in the same ridges, trenches, etc also turn way oceanic floor rough. The average depth of the ocean floor is 4000 meter.
Generally, from the coast to the middle of oceans and seas there exist Continental Shelf, Continental Slope, Deep Sea Plain, Oceanic Canyon, Oceanic Ridge, and Island and Deep Sea Trench. In fact, the shallow part of the oceans and seas surrounding the coast is called Continental Shelf. The considerably deep part after the continental shelf is known as the Continental Slope. After the continental slope there exists very deep oceanic floor and a large number of scattered ridges, island's etc appearing above the sea level. Among the oceanic trenches, the Mariana Trench and the Challenger Trench of the Pacific ocean floor is the deepest..
Answer for 4 marks.