Science
What are plants that grow, flower, make seeds and die in one year?
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The term, "black hole", was named by American physicist, John Wheeler, in which year?
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What is the name of the spacecraft that took the first men to the moon?
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When cool or cold air suddenly drops to the ground, it is known as a what?
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What is a spacecraft that orbits planets, moons or other large space objects called?
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What liquid is used as a standard when measuring density?
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