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How do plants cause weathering?
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High School Teacher
Plants can cause both mechanical and chemical weathering.
Mechanical weathering occurs when roots grow and cause the rock to break (just like the roots that crack the sidewalk).
Chemical weathering occurs when roots release chemicals, like acid, which then break down the rocks.
Posted by melony82 on October 28, 2008 at 10:08 AM (Answer #1)
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