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Ch06_As Presented

Ch06_As Presented - Chapter 6 Weathering and Soil Earth's...

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Chapter 6 Weathering and Soil
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Earth’s external processes Weathering – the physical breakdown (disintegration) and chemical alteration (decomposition) of rock at Earth’s surface Mass wasting – the transfer of rock and soil downslope under the influence of gravity Erosion – the physical removal of material by mobile agents such as water, wind, ice, or gravity
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Weathering Two types Mechanical weathering – breaking of rocks into smaller pieces Types of mechanical weathering Frost wedging Unloading Thermal expansion Biological activity
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Frost wedging Figure 6.3
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