Science

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

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A hurricane with winds between 110-130 miles per hour is considered what category storm?
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What was so unusual about the Mercury space flights?
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What constant is equivalent to 96,485 coulombs per mole of electrons?
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Which animal's chirps can be used to tell the temperature?
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Which of these planets is smallest in diameter?
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What is the perception of frequency called?
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What type of reproduction uses only one parent cell?
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