Earth
What is sedimentary rock composed primarily of sand-sized grains?
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What is the highest mountain, considering just the contiguous United States?
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What are large bodies of air with similar temperatures and moisture content called?
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What was the name of the August 2005 hurricane that damaged New Orleans?
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Which of these types of pollution occurs naturally?
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What is a seven-letter word meaning "movement of weathered material from gravity"?
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On which continent is the biggest area of rain forest found?
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