Science
Who was the first man in space in 1961?
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What is the freezing point of water in the Kelvin Scale?
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What is a body's resistance to changes in motion or speed called?
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Which of these is a famous astronomer for whom a comet was named?
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An isogeotherm is an imaginary line connecting points of equal temperature where?
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Which branch of science did young Carl Sagan tell his grandfather he wanted to practice?
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What type of circulatory system pumps blood into cavities instead of through vessels?
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