Science
What is the sticky bacteria that forms on teeth and gums?
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What are the huge storms that the sun produces called?
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John Glenn was the first American to orbit the earth, in how long a flight?
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What is a steep-sided circular depression commonly known as?
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Transfer of heat through a substance by molecular action best fits which science term?
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What tool do people at sea use to measure distance with echoes?
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What scientist first showed that a changing electric field produces a magnetic field?
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What is matter that allows light to pass through called?
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