Science
What is the tough outer layer of a seed called?
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The image of an object when seen in a mirror is called what?
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How long, in kilometers, is the average single thread unwound from a silkworm cocoon?
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What is it called when the Earth, Sun and Moon lie in a straight-line configuration?
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Which of these measurements of distance is the longest?
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What sort of electricity do you get when you rub two balloons and they stick together?
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What is matter that allows light to pass through called?
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