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Erosion

Erosion. Preview Questions: . What force causes sediment movement down a slope? What might cause a landslide?. Erosion . Erosion is the process by which natural forces move weathered rock and soil from one place to another. The material moved by erosion is called sediment .

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Erosion

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  1. Erosion

  2. Preview Questions: • What force causes sediment movement down a slope? • What might cause a landslide?

  3. Erosion • Erosion is the process by which natural forces move weathered rock and soil from one place to another. • The material moved by erosion is called sediment. • Gravity moves sediments downhill. Gravity causes mass movement.

  4. Agents of Erosion • Gravity • Wind • Running water • Glaciers • Waves • Wind

  5. Mass Movement • Three types of mass movement are: • Landslides • Mudflows • Slump • Creep

  6. Landslides • The most destructive type of mass movement. • Rock and soil slide quickly down a steep slope.

  7. Mudflows • Rapid downhill movement of a mixture of water, rock, and soil.

  8. Slump • Mass of rock or soil suddenly slips down a slope. • The material slumps down in one large mass.

  9. Creep • The very slow downhill movement of rock and soil.

  10. Questions: • What is creep? Sketch a drawing of it. • What is the difference between a landslide and a slump? 3. A fence runs across a steep hillside. The fence is tilted downhill and forms a curve rather than a straight line. What can you infer happened to the fence?

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