Oceans

The longest river in Europe flows into what sea?

More Questions from Oceans
What is eutrophication as it applies to oceans?
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The group of crustaceans that include crabs, lobsters and shrimps have how many legs?
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An estuary connects the ocean to a what?
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Where does the female marine catfish lay her eggs?
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What is the area in the ocean that can never be touched by sunlight called?
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What keeps the salinity of the ocean the same throughout the year?
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What is the periodic rise and fall in the ocean's water level called?
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Which of the following body parts does the beluga whale not have?
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