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how is temperature related to mechanical weathering

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supertolga10
minerals with daytime heating of the rock surface of the sun expands. at night the temperature drops and minerals shrinkage. Most of the rocks contain minerals that cause the fragmentation and crumbling rock surface at different rates of expansion and shrinkage. mechanical separation process is committing such.
thisisbenmanley
Two main reasons:
1) As the day passes by, the heat from the sun causes slight expansion in rocks. When night comes and everything cools down, the items shrink again.  This constant daily cycle of expanding and shrinking slightly gradually beats away the surrounding materials.

2) Throughout the years, water collects in cracks in the rocks or roads during the middle of the year and then freezes during the winter.  As water freezes to become ice, it expands, cracking its surroundings.
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