Oceans

The definition of "a large surface area whose waters are drained off into a principal river system" best fits which science term?

More Questions from Oceans
A finless porpoise takes its name from a near-complete lack of which fin?
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What type of sea creature is an Orca?
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What is a cataract in a river?
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What two natural predators are known to prey on beluga whales other than humans hunting them?
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What is eutrophication as it applies to oceans?
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In which ocean would one find the Sargasso Sea?
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What percent of the ocean is salt?
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Which of these ocean activities provides food?
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