The document discusses different types of weathering that affect rocks, including exfoliation where heavy outer layers of granite peel off due to expansion differences between layers, chemical weathering where minerals in rocks chemically change and break down due to carbonic acid formed from carbon dioxide and rainwater, and physical weathering where plant growth and abrasion by wind can break rocks apart.

2. Exfoliation Some buried rocks are changed when heavy layers of the rock wear away. of the once-buried granite expand more than the layers Below. This causes the outer layer of the rock to peel off.

3. Chemical Weathering A rock can break down when minerals in the rock changes chemically. When these changes happen, chemical weathering takes place.

5. Horizon

6. Humus

7. Physical Weathering When plants get into rocks and start to grow.

8. Abrasion This is a wind abrasion.