1. Weathering, Erosion and Deposition
Chapter 10.4

2. Weathering The process of breaking down rock into smaller fragments
Physical Weathering – broken by physical means
Chemical weathering – chemical reactions cause rocks to breakdown
Biological Weathering – caused by a plant or animal

3. Physical Weathering

4. Chemical Weathering

5. Erosion
Once rock has been broken into fragments, it gets carried away.
Wind, water, glaciers, and gravity are the main transporters.

6. Deposition
After rocks are picked up and moved, they also get placed down.

7. Chemical Weathering causes caves
Carbon dioxide in the air combines with rainwater to make carbonic acid
This acidic rain falls on the ground
It can react with limestone or marble underground
The rock disappears and caves form.
GOOD LINK!!!

8. Karst Topography
When a large cave is close to the surface a sinkhole can result!
An area with many sinkholes is called karst.

9. Homework!!
Read Chapter 10.4
Work through section 10.4 in your workbook