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Chemical Weathering

Unit Plan: Weathering, Erosion & DepositionLesson: 3
9-12Urban Ecosystems
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Summary: Students should have an idea of the following:  Physical weathering breaks objects into smaller pieces but does not change the identify of the object. Water is a major component of Physical weathering due to its ability to expand when it freezes and through flowing water aiding in abrasion.  These two processes are a significant components in the formation of potholes in city streets as well as in the natural landscape.  Questions they should consider include: how can weathering change the composition of the rocks?

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