1. Mass Erosion Erosion of the Earth due to the force of Gravity

2. Video Clip 1)Watch the clip for the effects of erosion. 2)http://player.discoveryeducation.com/index.cf m?guidAssetId=D8AC0072-E189-4BEE-B422- E8ED32BA5443&blnFromSearch=1&productcod e=DSC - http://player.discoveryeducation.com/index.cfm ?guidAssetId=D8AC0072-E189-4BEE-B422- E8ED32BA5443&blnFromSearch=1&produchttp://player.discoveryeducation.com/index.cf m?guidAssetId=D8AC0072-E189-4BEE-B422- E8ED32BA5443&blnFromSearch=1&productcod e=DSC - http://player.discoveryeducation.com/index.cfm ?guidAssetId=D8AC0072-E189-4BEE-B422- E8ED32BA5443&blnFromSearch=1&produc

3. Discussion What tragedy did the clip describe? Why did this occur? What force created the landslide? How does this relate to erosion?

4. Graphic Organizer 1)Head the worksheet. 2) Fill in the worksheet while viewing the power point.

5. Mass Erosion …is the downhill movement of weathered materials …is caused by gravity … can occur quickly or slowly

6. Quick Mass Erosion Landslide : Sudden movement of rocks down a hill Rock can be loosened by volcanic activity, earthquakes, or heavy rain The pile of rocks at the bottom of a landslide is called a TALUS pile. http://video.nationalgeographic.com/video/environmen t/environment-natural-disasters/landslides-and- more/landslides/ - Landslide Video Cliphttp://video.nationalgeographic.com/video/environmen t/environment-natural-disasters/landslides-and- more/landslides/ - Landslide Video Clip

7. Quick Mass Erosion Mudflow : Sudden flow of mud down a hill Occur in dry, mountainous regions after a heavy rainfall

8. Slow Mass Erosion Earthflow : Slow movement of soil, rocks, and plant life down a hill Caused by loose earth and extra moisture as well as gravity Part of a hill looks like it is sliding away

9. Slow Mass Erosion Creep : Slowest form Gravity pulling soil and rocks down a gentle slope Clues: Bent trees or telephone poles

10. Closure: What force causes mass erosion? State a type of mass erosion and describe its movement.

11. Which Type Is This? Creep

12. Which type of mass erosion buried this Indonesian temple? Mudflow

13. What do we call the pile of rock at the bottom of the hill? Talus Pile