Science
Which of these is a cause of water pollution?
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What scientist discovered that sunspots occur in an eleven-year cycle?
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What does a reflecting telescope use to bend light?
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Which of the following books has Carl Sagan not authored?
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What makes up about 70 percent of most living things?
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The definition of "highest instantaneous wind speed observed or recorded" best fits which science term?
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What is the repeated sound when sound waves bounce off other objects called?
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