Earth

Which of these pairs of elements was discovered before the 14th century?

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What is the very bottom soil horizon called?
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What is the opening that spews out lava called?
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What is another name for an estuary?
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Which of these habitats is a dry one usually with sand and can sometimes be very hot?
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Yosemite National Park is an easily recognizable part of what batholiths?
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What is the boundary between two air masses called?
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What are minerals found in high quantities and worth mining called?
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What is the transport of top layers of soil to another place called?
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