Notes

Slide Show

Outline

1	Moving Rock Weathering & Erosion
2	Weathering Processes that change the characteristics of rocks on the Earth’s surface Must occur BEFORE erosion can happen No movement is involved Occurs when rocks are exposed to water, air or plants
3	Mechanical Weathering BREAKS rocks into different shapes and smaller sizes Jagged rocks usually become smooth
4	Abrasion Breaking, grinding, wearing away of rock Caused by wind and water
5	Frost Action or Ice Wedging Freezing water in cracks expands and breaks rocks
6	Plate Movement The moving and sliding of tectonic plates wear away rocks as they slide past each other
7	Exfoliation / Temperature Change Warming and cooling of rock causes top layers to break off in sheets
8	Close to Home – Enchanted Rock
9	Plants and Animals Wedging of roots and burrowing of animals wears away rock
10	Close to Home – Texas Hill Country
11	Chemical Weathering Process by which rocks are decomposed, dissolved or loosened by chemical processes to form sediment
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15	Erosion The removal of weathered rocks by the action of: Water Wind Ice Gravity
16	Water Erosion
17	Close to Home – Canyon Lake
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19	Close to Home – Beach Erosion
20	Wind Erosion
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23	Ice Erosion
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25	Gravity
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