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Weathering

Published on Dec 16, 2015

Physical and chemical weathering

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1.

Weathering

Breaking Down Rock
Photo by Justin in SD
2.

Two types of weathering

Physical & Chemical
Photo by alexbrn
3.

Physical Weathering

Photo by Blaž Vizjak
4.

Tree roots can wedge into cracks

Photo by Tim Green aka atoach
5.

Abrasion by water, wind, and ice can wear away at rocks

Photo by glaciergirl
6.

Pressure release can cause cracks and exfoliation

Photo by Greg Carley
7.

Ice wedging can wedge open cracks

Photo by Bob Coleman
8.

Chemical Weathering

Photo by cold_penguin1952
9.

Carbonic acid and other acids can dissolve rock

Photo by James St. John
10.

Lichens release acids that weaken rocks

Photo by mountainamoeba
11.

Plant roots and leaves release acids that weaken rocks

Photo by cdsessums
12.

Oxidation can change rock into brittle substances

Photo by Dru!

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