Science

What is the hardest known natural material?

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Which of these is a virus that doesn't immediately cause damage to tissue?
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Who was the first person to use a telescope for astronomy?
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What word is the definition of 100,000 BTUs?
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Scott and Worden were crewmembers on which Apollo mission?
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The process by which plants make food is called what?
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What are the Southern Lights called?
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What is it called when the Earth, Sun and Moon lie in a straight-line configuration?
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The science term "precipitation" is best defined as which of these?
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