1. Weathering and Erosion
Weathering changes the surface of the Earth over time.

2. Physical Weathering
Process by which rocks are broken down into smaller pieces by external conditions.
Types of Physical weathering
Frost heaving and Frost wedging
Plant roots
Friction and impact
Burrowing of animals
Temperature changes

3. Frost Wedging

4. Frost Heaving

5. Plant Roots

6. Friction and Repeated Impact

7. Burrowing of Animals

8. Temperature Changes

9. Chemical Weathering
The process that breaks down rock through chemical changes.
The agents of chemical weathering
Water
Oxygen
Carbon dioxide
Living organisms
Acid rain

10. Water
Water weathers rock by dissolving it

11. Oxygen
Iron combines with oxygen in the presence of water in a processes called oxidation
The product of oxidation is rust

12. Features of Karst: Caves

13. Erosion
The process by which water, ice, wind or gravity moves fragments of rock and soil.

14. Water Erosion
Rivers, streams, and runoff

15. Ice Erosion
Glaciers

16. Wind Erosion

17. Mass Movements Landslides, mudslides, slump and creep
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