Earth

What is the very bottom soil horizon called?

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If the beach loses 3 feet of sand each year, how many feet will it lose in 15 years?
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Where does hail form?
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What energy does Earth give back to space?
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Which of these is the longest river in the world?
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In which country is Fiordland, which contains the Milford Sound fiord, located?
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The Earth's atmosphere lies just above what part of its composition?
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A clear sky contains very few what?
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What was the name of the August 2005 hurricane that damaged New Orleans?
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