1. Definitions: Weathering: the break-up of rock at earth’s surface Erosion: the physical removal and transport of rock material by water, wind or ice.

2. Soil Erosion Definition: the transportation of weathered material by water, wind, or ice Recycling of Earth materials Part of the Rock Cycle Natural process Varies from place to place ES1204, ES1205 http://www.youtube.com/watch?v=PQmon7Rj6ns

3. How soil is eroded Rain drops loosen soil Flowing water across the surface carries away the dislodged soil particles (sheet erosion)

4. Tiny channels (rills) cut deep valleys (gullies) Sediment is transported downstream

5. Sediment is deposited in Reservoirs, seas, lakes and river Mississippi River carries sediment

6. Rates of erosion depend on Soil characteristics Climate: wet, dry windy Slope: steep Type and amount of vegetation / trees Human activity: farming, logging, construction

7. Mississippi River carries weathered sediment

8. Sediment is transported downstream And deposited- eventually to the sea

9. Transporting weathered material by WIND

10. Measures that prevent or slow the rate of erosion