Science
What percent of the Sun, by weight, is helium?
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Who was the famous Polish female scientist who won a Nobel Prize?
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John Glenn was the first American to orbit the earth, in how long a flight?
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Launched in 1995, what was the SOHO spacecraft designed to study?
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An isogeotherm is an imaginary line connecting points of equal temperature where?
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The definition of "process of removing salts from water using a membrane" best fits which science term?
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What process produces a duplicate of the original cell?
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