Science
What is a giant crack in a rock called?
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What university did astronomy and space science theorist Carl Sagan teach at?
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Who was the scientist to propose the three laws of motion?
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Which animal's chirps can be used to tell the temperature?
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What metal is used for most electrical wire and cable?
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What is the generic term for very small loose particles of hard, broken rock or minerals?
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Who discovered that a moving magnet generates electric current known as electromagnetic induction?
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