Oceans

What instrument uses sound waves to help get a picture of the ocean's bottom?

More Questions from Oceans
Typically a tsunami is caused by what?
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What does a Nictitating membrane on a shark do?
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What ship canal that connects the Atlantic and Pacific oceans was built between 1904 and 1914?
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An estuary connects the ocean to a what?
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Bacterioplankton means what as it relates to the environment?
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What is the acronym for an instrument that measures Conductivity-Temperature-Depth of sea water?
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What do ship captains use to help them know when it is safe to dock at the ocean's edge?
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On a reef, an individual coral is known as a what?
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