Oceans

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

More Questions from Oceans
Which of the following traits are used to help classify whales as mammals?
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In what year did the International Whaling Commission declare blue whales to be a protected species because of a huge decrease in their population?
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Which river represents almost 20% of the world's freshwater discharge into the oceans?
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Coral, the largest component of reefs, is most like what type of organism?
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What gas that you breathe, necessary for life, is also dissolved in ocean water?
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Where on the Earth would oceans be warmer?
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What is the third largest shark in the world?
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What is the largest island in the Indian Ocean?
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