International Relations Prelims Question

Physical or mechanical weathering processes depend on some applied forces. The applied forces could be: (i) gravitational forces, such as overburden pressure, load and shearing stress; (ii) expansion forces due to temperature changes, crystal growth or animal activity; (iii) water pressures controlled by wetting and drying cycles.
Some of the physical processes are: Unloading and expansion; Temperature changes and expansion; Freezing, thawing and frost wedging; and Salt weathering.

Oxidation and reduction is a type of chemical weathering process.

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