Science
What tool do people at sea use to measure distance with echoes?
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The definition of "highest instantaneous wind speed observed or recorded" best fits which science term?
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What is the generic term for very small loose particles of hard, broken rock or minerals?
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Which substance will have the highest increase in temperature for the same amount of heat?
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What is a dark area that light does not reach called?
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Deep trenches such as the Grand Canyon were formed by what process?
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Which kind of tree is most often struck by lightning?
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