Earth

From where does 90% of the water vapor in the air come?

More Questions from Earth
Which of these is not a type of deep-sea sediment?
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What is a sudden and heavy rainfall or downpour called?
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What are the three main categories of rock?
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Which of these habitats is a dry one usually with sand and can sometimes be very hot?
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What is the term for the Earth's crust where it underlies oceans?
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What are the traces of animals and plants left in rocks called?
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What is a plant with no internal system of tube like structures called?
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What is the current era in the geologic time scale?
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