1. 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

2. Surface Area

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

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

9. Physical Weathering Water = rocks become round, smooth and smaller.
Abrasion = rocks break down from rubbing against each other.

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

15. Physical Weathering
Animals =
Ants / Worms
Humans

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

17. Oxidation

19. Hydrolysis

20. Carbonation

21. Salt (Honeycomb)