Unformatted text preview: Chemical weathering always changes at least one mineral in a rock as for mechanical weathering, it breaks fragments of a rock without changing the minerals of a rock. Both mechanical and chemical weathering keep some of the same minerals but each process alters it in a different way. It is important for the break down of rocks for both chemical weathering and mechanical weathering to work together. Mechanical weathering for examples breaks down rocks into smaller segments, making is a wider area for chemical weathering to take place and easier for it to break a rock down since it will be weaker and smaller. This process repeats itself. You did not discuss the processes operating in each. For mechanical you should have discussed frost wedging, unloading, salt crystal growth, thermal expansion, and biological activity. The most common factor in chemical weathering is water and the forms of chemical weathering are dissolution, hydrolysis, and oxidation...
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- Fall '10