Science

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

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Which song was used to wake up the first Space Shuttle crew in orbit?
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Transfer of heat through a substance by molecular action best fits which science term?
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What is the freezing point of water in the Kelvin Scale?
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Where would you find the zone of polarizing activity?
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What is the tissue that gives rise to the xylem and phloem?
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Approximately how many miles of wire are there in a 737?
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Which Apollo mission was launched on December 21, 1968, and spent Christmas in lunar orbit?
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What type of tissue makes up the femur?
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