Earth
What layer of the Earth's atmosphere contains the ozone layer?
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What are mounds of sand that have been windblown called?
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What periods of the Earth's history had glaciers covering a lot of the Earth?
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What chamber do divers go into to prevent a diving sickness called "the bends"?
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According to tradition, what insect in the town of Vermilion predicts the winter weather?
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Which is the largest planet in Earth's solar system?
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