1. What are agents of erosion?

2. EROSION
The transport of material on the surface of earth

3. Transporting agents
Gravity
Wind
Running water (streams)
Waves
Glaciers

4. GRAVITY
The force that drives all erosion (*** It is not the main agent of erosion it is the force behind all the others)
Pulls water, rocks, and sediments down slopes
oregon landslide
Landslides, avalanches (snow), mass movements, slumping, and creep

5. Materials on a slope
Are unstable- friction holds them there but gravity is pulling on them- When the gravitational force exceeds the frictional force they slide down- leaving a pile of unsorted sediments called TALUS

6. MASS MOVEMENT
When large areas of rocks and sediments are pulled down a slope
Called mass wasting

7. LANDSLIDES/ AVALANCHES

8. AVALANCHES

9. SLUMPING

10. HILLSIDE CREEP

12. Wind
Dominates in Dry climates because wind can transport dry sediments easier than it can transport wet ones.
Usually only smaller sediments (clay, silt, sand) are moved
Creates cross bedding

13. How can you tell wind direction with sand dunes?
windward side- direction wind was blowing from
Leeward side – direction wind was blowing to.
building of the dunes

15. Running Water Water moving over the surface of the Earth
Streams & rivers
**The main agent of erosion on earth today
** Carved out the Grand Canyon

16. Glaciers
As glaciers (large masses of ice on land) move over the surface they scratch and push rocks underneath them
Capable of transporting the largest sediments (boulders)