Oceans

What surface rock comprises the majority of the Earth's crust in the area beneath the oceans?

More Questions from Oceans
What animal is a meat-eating, freshwater fish?
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What instrument uses sound waves to help get a picture of the ocean's bottom?
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Approximately how many pounds does the average sperm whale's heart weigh?
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Where on the Earth would oceans be warmer?
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What does a walrus eat?
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What is a common unit of depth in the ocean?
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What's the name for the scientific study of bodies of fresh water?
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What ocean lies between Africa and North and South America?
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