1. Bellringer: How is rock broken up and changed? By Weathering at earth’s surface How is Soil broken up and changed? By Erosion: the physical removal and transport of rock material by water, wind or ice.

2. What is 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 https://www.youtube.com/watch?v=ZNJe6hrdL3M

3. How soil is eroded? Rain loosens 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. Where is Sediment deposited? 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. How can we slow the rate of erosion?