Science
What is the opening of a lens, which controls the amount of light?
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Which of these was one of the original universal elements?
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Launched in 1995, what was the SOHO spacecraft designed to study?
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What is the potential energy in the nucleus of an atom called?
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What space object did some ancient cultures rely on to tell the passage of time?
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What is a space which is entirely devoid of matter called in science terms?
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Scott and Worden were crewmembers on which Apollo mission?
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What word is given to sounds that are too high for humans to hear?
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When cool or cold air suddenly drops to the ground, it is known as a what?
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