Science

What is matter that doesn't allow light to pass through called?

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Which of the following is a type of cloud?
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Optics is the study of what?
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What is the irregular and instantaneous motion of air called?
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Which bridge has the longest span in the U.S.?
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If you are caught in a sudden heavy rainfall of a showery nature, you are caught in a what?
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What two animals are found on the Australian Coat of Arms?
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What specifically is a bezoar called those results from persimmon ingestion?
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