Oceans

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

More Questions from Oceans
What ocean is off the east coast of the United States?
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The Amazon River is connected to which major ocean?
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As much as 80% of marine debris comes from what source?
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What surface rock comprises the majority of the Earth's crust in the area beneath the oceans?
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On the floor of which ocean would you find the Mid-Atlantic mountain ridge?
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Which of these states is closest to the Pacific Ocean?
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The Atlantic Ocean separates Brazil from which continent?
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What is the world's largest coral reef?
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