Earth
Which volcano in Iceland was once thought to be a gateway to the underworld?
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What is the low pressure area along the equator called?
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What mineral makes both sapphires and rubies when cut and polished?
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About what percentage of solar radiation is absorbed by Earth's atmosphere, oceans and land masses?
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What is a seven-letter word meaning "movement of weathered material from gravity"?
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A vine disease caused by a fungus that attacks the green part of the vine is called?
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