Science
John Glenn was the first American to orbit the earth, in how long a flight?
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What type of reproduction uses only one parent cell?
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What would you use to measure the mass difference between two like objects?
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The four engines of a Boeing 747 jet produce 188,000 pounds (85,275 kilograms) of what?
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What is the watering of land by artificial means called?
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Which parts of a flower are often brightly-colored and have many different shapes?
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What sort of electricity do you get when you rub two balloons and they stick together?
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Which of these was one of the original universal elements?
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