Science
Of which body system is the kidney an organ?
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Which state saw the first self-sustaining nuclear chain reaction in 1942?
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Which of these is a factor that is tested in the scientific method?
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Which Apollo mission was launched on December 21, 1968, and spent Christmas in lunar orbit?
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The Great Red Spot of Jupiter is as wide as how many times as wide as Earth?
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What scientist is credited with developing the first vaccine?
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What is the only joint of the body with 360 degrees of rotation?
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