4.1 Section Review
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What is physical weathering?
the process by which rock is broken down into smaller pieces by physical changes
What does chemical weathering do to the original minerals?
It changes their original composition.
Define chemical weathering
the breakdown of rocks by chemical reactions
What is the main agent of chemical weathering?
water
Describe how exfoliation forms talus.
Talus is the broken fragments at the base of a cliff or mountain formed when rocks are under stress and outer layers break or peel off in sheets
