Science

What do our bodies need from the air we breathe?

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Launched in 1995, what was the SOHO spacecraft designed to study?
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What is the tough outer layer of a seed called?
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When did Panama move from South America to North America?
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Which of these is a scientific definition for the term "matter"?
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What are many cells that form together to provide a certain function called?
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What is the reproductive organ of most seed-bearing plants?
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Which star is the brightest star in the northern sky at night?
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What color is malachite?
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