Earth

What is the top layer of the soil called?

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Where is the type location for the Permian Period?
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What was the Great Plains of the U.S. called in the 1930's because of erosion?
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Which of the following describes a period of abnormally dry weather for a specific area?
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What is the name for snow crystals that melt and refreeze into granular particles on glaciers?
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What is the largest natural carbon sink on earth?
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Which is the process of placing plants in a certain way in an area?
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What is water that flows over the ground rather than seeping into it called?
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Which of the following lakes has a higher salt content than normal?
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