Earth Science Week n http www earthsciweek orgwhatises

Earth Science Week n http: //www. earthsciweek. org/whatises w/index. html

Mass Movement Changing Earth’s Surface

Review Weathering n Erosion n Soils n

Cycle of Erosion and Deposition What is a cycle? What are some cycles? n Deposition – the agents of erosion deposit sediment n – Sediment – material moved by erosion

Cycle of Erosion and Deposition n The cycle that wears down and builds up Earth’s surface.

5 Agents of Erosion Gravity n Running water n Glaciers n Waves n Winds n

Mass Movement One of several processes that move sediment downhill. n Can be very fast or very slow n Gravity!!! n

Mass Movement Landslide n Mudflow n Slump n Creep n http: //www. youtube. com/watch? v=mk n. St. AMia 0 Q n

Landslides Most destructive n Rock and soil slide quickly down a steep slope n

Mudflows Rapid downhill movement of a mixture of water, rock, and soil. n Occur after heavy rains in a normally dry area. n

Slump Stand up straight, arms at your side n Slump your shoulders n What happened? n n A mass of rock and soil suddenly slips down a slope.

Slump This is different from a land slide n The material moves down in a large mass. n

Creep n You tell me!!

Creep The very slow downhill movement of rock and soil n Can occur on any slope n

n http: //videos. howstuffworks. com/hsw/ 11857 -land-water-weathering-and -erosion-video. htm