Science
What protects our Earth from harmful rays?
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What is the name of the spacecraft that took the first men to the moon?
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Which electronic component can be classified as NPN or PNP?
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How many times more does Jupiter radiate energy than what it receives from the sun?
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What is the world's largest non-profit, scientific and educational organization?
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Which song was used to wake up the first Space Shuttle crew in orbit?
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Which of the following characteristics is the force of gravity dependent on?
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Which aeronautical term is a moveable surface on an aircraft which controls its motion?
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