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Earth
Ruby and sapphire are gem forms of which mineral?
Earth
Ruby and sapphire are gem forms of which mineral?
Corundum
Chalcedony
Chrysoberyl
Chrysoprase
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Which season does the part of Earth tilted towards the sun experience?
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Which of the following is a natural resource?
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Mercurial barometers measure what?
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John Glenn first orbited the earth in what year?
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Which of these is also known as "squawroot"?
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How long does it take for the Earth to rotate around completely on its axis?
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Which of the following terms refers to the process of mountain building?
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Which tree can grow the tallest?
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