1. Surface Area

2. The breakdown of rocks into smaller particles.
Weathering
The breakdown of rocks into smaller particles.
2 Types
Physical: Only size and shape changes.
Chemical: composition changes

3. What causes physical weathering?
Ice = freezing and thawing (frost cycle).

4. Physical Weathering
2. Water (streams, rivers) = rocks become round, smooth and smaller.
Abrasion = rocks rub together and break down.

7. Physical Weathering 3. Wind = rocks get pitted from blown particles.
Ventifact = angular, pitted rock with 1 or more flat sides.

10. 4. Plants = roots grow and expand, breaking rock apart.
Physical Weathering
4. Plants = roots grow and expand, breaking rock apart.

13. Physical Weathering
Animals =
Ants / Worms
Humans

14. Chemical Weathering 3 Types Oxidation = reaction with O2
Hydrolysis = reaction with H2O
Carbonation = reaction with CO2
** Occurs faster in hot and wet weather.

15. Oxidation

17. Hydrolysis

18. Carbonation

19. Salt (Honeycomb)