Earth

What is the name of any body of igneous rock named for the Roman god of the underworld?

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What is water that flows over the ground rather than seeping into it called?
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What is the weather phenomenon known as a "tsunami"?
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According to tradition, what insect in the town of Vermilion predicts the winter weather?
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Hot, hazy weather mixed with pollution leads to what?
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Which of these pairs of elements was discovered before the 14th century?
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The Appalachian Mountains are best described as what type of mountains?
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Which of these might help keep erosion near a stream from happening?
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Which of these islands is not considered a "hot spot", according to plate tectonic theory?
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