Science

What is the hardest known natural material?

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Which of the following things can move the fastest?
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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 are the big holes and dents found on the Moon called?
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What is the liquid component of blood known as?
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Which electronic component can be classified as NPN or PNP?
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Which scientific term means "measure of resistance to flow in a liquid"?
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Which of these particles was discovered first?
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Who discovered the supernova and was the first to theorize that stars "die"?
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