Ocean terms and definitions

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Waves that are caused by an earthquake beneath the ocean floor.

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A smooth, nearly flat region of the deep ocean floor that is covered with thick layers of mud

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The coming in and going out of the ocean waters every 12 hours. Caused by the gravitational pull of the moon on the Earth.

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A measure of the amount of salt dissolved in the ocean water.

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A motorized vehicle designed to go into the depths of the ocean to explore new areas.

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Technology that uses sound waves to measure distances from the ocean floor to the surface.