Earth
What process carries minerals down into lower soil horizons?
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What destructive event can happen when it rains for a long period of time?
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What polluting material can choke an animal by getting caught around its neck?
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What weather-related term comes from Greek words for "high in the sky" and "knowledge"?
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What kind of scientist would study rocks, minerals and mountains?
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What can help farmers control erosion in their fields?
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What is compressed moss that turns blackish brown called?
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What is water treated with to prevent bacteria from growing?
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