Earth

What is the very bottom soil horizon called?

More Questions from Earth
What is the very sticky form of clay till called?
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How long does it take for the Earth to rotate around completely on its axis?
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Which of the following is a model of the earth?
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What kind of calendar traditionally predicts the weather?
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How many continents does Earth have?
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What is a meteoroid called if it lands on the Earth's surface?
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What are the bodies of water that surround the Earth's continents called?
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What imaginary line divides the Earth's northern and southern hemispheres?
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