Question 6
Name four processes of physical weathering.
Observation
This was a compulsory question that was correctly answered by most of the candidates and they scored high marks. A few of the candidates however could not get the correct answer. The required points were:
- freezing and thawing (Frost shattering);
- exfoliation(onion bulb weathering)/pressure release sheet weathering;
- salt crystallization/salt crystal growth;
- alternate wetting and drying;
- spheroidal weathering.