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Soil erosion

QuestionAnswer
What is the difference between a barrier spit and a sandbar? A barrier spit is connected to land and a sandbar is not.
How does black sand form? Volcanic rock.
What is the lowest soil horizon made of? Bedrock.
How far do the roots of plants extend into the topsoil? About 75%.
True or False: The Amazon has very thick soil, which is why it can support so much life. False.
Created by: zoohunter
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