Earth
What color was the dust that swept the Great Plains?
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What is water treated with to prevent bacteria from growing?
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What is the system consisting of the Earth's sun and the eight planets orbiting it called?
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Which pairs of minerals are almost always found together?
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What is a sudden and heavy rainfall or downpour called?
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A line of equal or constant air temperature is what?
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What is a seven-letter word meaning "movement of weathered material from gravity"?
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In which U.S. state was the prehistoric proglacial lake Glacial Lake Missoula located?
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