1. Today’s Agenda…  Flashback  Notes on Erosion – Part II  BrainPop on Erosion  Chapter 11 Review Worksheet (Due Tuesday)

2. Erosion – Part II Study Pack # 11

3. Today’s Goals…  I can explain the causes of erosion.  I can describe the effects of erosion.

4. Review…  What is erosion?  How is it different than weathering?  How do weathering and erosion work together?  What are the four causes of erosion?

5. More Review…  How does gravity cause erosion?  What is it called when gravity alone causes rocks or sediment to move down hill?  What are the four different types of mass movement?  How are the four types of mass movement different?

6. Ice  Glaciers are large pieces of ice  Glaciers move downhill because of gravity –They pick up sediments and carry them

7. Ice  Glaciers remove the lose pieces of rock from weathered rocks  Glaciers carrying these rocks can scratch and erode rocks as they move

8. Ice  What are the effects? –Glaciers can remove rock from mountain tops –Produce wider, u-shaped valleys –Figure 12, page 327 –Glaciers lay down sediments and then they are washed away

9. Wind  How would wind cause erosion?  When wind blows loose sediment, it carries it away  Wind that is carrying sediments can also wear down other rocks, this is called abrasion

10. Wind  When wind slows down it will drop sediment – this is called depositon  This could create certain landforms –Sand dunes

11. Water  How does water cause erosion?  When water flows over Earth’s surface it is called runoff  Runoff can carry sediments  The faster the water is running, the more sediment it can carry

12. Water  Water can flow over Earth’s surface in many ways  Read pages 329 – 330 –Sheet Flows –Rills and Gullies –Streams THINK PAIRSHARE

13. Erosion Changes Earth’s Surface  Rock and sediments are moved from one place to another  Where material is removed canyons and valleys form  Where material is deposited deltas, sandbars, and sand dunes are created

14. More about erosion…  BrainPop BrainPop