1. Weathering, Erosion and Depostion

2. Weathering The breaking down of rocks into small particles such as sand and pebbles. There are two types of weathering: Physical and Chemical weathering.

3. Physical Weathering There are several types: Exfoliation (flaking) of rocks due to expansion in extremely high daytime temperatures contraction in very cold nights.

4. Physical Weathering Ice Wedging – water that gets into the cracks of rocks freezes and expands to split the rock.

5. Physical Weathering Abrasion – particles such as sand are carried by the wind or water and act like sandpaper.

6. Physical Weathering Tree Roots – roots growth can weaken dirt or work their way into rock cracks

7. Physical Weathering Animals or Man – wearing the way of rock or soil by walking or use of machinery.

8. Chemical Weathering When natural chemicals break down rocks Acid rain – from air pollution

9. Chemical Weathering Natural Acid – from decaying plants

10. Erosion The process of carrying away the small rock, sand or pebble particles. The agents of erosion are: Wind

11. Erosion The process of carrying away the small rock, sand or pebble particles. The agents of erosion are: Gravity

12. Erosion The process of carrying away the small rock, sand or pebble particles. The agents of erosion are: Water

13. Erosion The process of carrying away the small rock, sand or pebble particles. The agents of erosion are: Animals or Man

14. Deposition The depositing or dropping of eroded material in new location. Delta or Alluvial Fan

15. Deposition Mountain Bases