Earth
What instrument measures water vapor in the atmosphere?
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In which U.S. state was the prehistoric proglacial lake Glacial Lake Missoula located?
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What type of clouds are thick and puffy and can sometimes turn into thunderstorms?
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What are mounds of sand that have been windblown called?
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What is the imaginary line that runs from the North to the South Pole called?
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What is the area on one side of a mountain that receives little rain called?
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What were water mills used for in the 1700's in Europe?
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