• Chemical weathering works through chemical reactions that change the rock.
  • Minerals that were stable deeper in the crust are not stable under surface conditions.
  • Carbon dioxide and oxygen are also agents of chemical weathering.
  • Chemical weathering changes the composition of a mineral to break it down.
  • As rock breaks into smaller pieces, the surface area of the pieces increases.
  • As plant roots take in nutrients, they remove elements from the minerals.
  • This causes a chemical change in the rock that is called oxidation.
  • Carbonic acid is a common, weak acid found in nature.
  • This acid works to dissolve rock.
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