Presentation on theme: "What are the forces of erosion and deposition that"— Presentation transcript:
1 What are the forces of erosion and deposition that shape our landscape?Suppose that you fill a jar halfway with layers of gravel, sand, and soil. Then you fill the jar with water, cover it tightly, and shake for 5 seconds. What effect would shaking the jar have on the soil, sand, and gravel? What would happen to them after the shaking stops? Explain your answer.
2 Wearing Down and Building Up Weathering, erosion, and deposition act together in a cycle that wears down and builds up Earth’s surface.
3 Mass MovementThe different types of mass movement include landslides, mudflows, slump, and creep.
5 Sediment in MotionStreams carry sediment in several ways.
6 Runoff and ErosionPrecipitation over the United States averages about 75 cm per year. About 22.5 cm becomes runoff. Generally, more runoff means more erosion.
7 Runoff and ErosionWater flowing across the land runs together to form rills, gullies, and streams.
8 Erosion by RiversA waterfall forms where a flat layer of tough rock lies over a layer of softer rock that erodes easily. When the softer rock erodes, pieces of the harder rock above break off, creating the waterfall’s sharp drop.
9 Erosion by RiversErosion often forms meanders and oxbow lakes where a river winds across its floodplain.