5 Agents of Mechanical Weathering by alayna_pi21

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Slide Notes

5 Agents of Mechanical Weathering

Published on Nov 23, 2015

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PRESENTATION OUTLINE

5 Agents of Mechanical Weathering

By: Alayna Piening

Photo by HowardLake

Animal Actions:
Animals that burrow in the ground loosen and break apart the soil.

Photo by cliff1066™

Freezing and Thawing:
When water freezes in a crack in a rock, it expands and makes the crack bigger- frost wedging

Photo by nemodoteles

Plant Growth:
Plant roots enter cracks in rocks. As roots grow, they force the cracks apart.

Photo by Pondspider

Release of Pressure:
As erosion removes material from the surface of a mass of rock, pressure on the rock is reduced, causing the rock to flake off.

Photo by kjoyner666

Abrasion:
Sand and other rock particles that are carried by wind, water, or ice can wear away exposed rock surfaces like sandpaper on wood.

Photo by coloneljohnbritt

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