Question

Give two differences between physical and chemical weathering.

Distinguish between physical and chemical weathering.

Answer 1

Physical Weathering	Chemical Weathering
Breaks down rocks into smaller pieces without changing their chemical composition.	Changes the chemical composition of minerals in the rock, forming new substances.
Common processes include freeze-thaw, thermal expansion, and pressure release.	Common processes include oxidation, carbonation, and hydration.
Rocks are broken into smaller pieces, but their mineral composition remains unchanged.	Minerals in the rock are chemically altered or dissolved, changing the rock's composition.
Temperature changes, freeze-thaw cycles, pressure, and plant roots.	Water, oxygen, carbon dioxide, and acids.
Expansion and contraction due to temperature (exfoliation), freeze-thaw in cold climates, and root action.	Expansion and contraction due to temperature (exfoliation), freeze-thaw in cold climates, and root action.
More common in regions with large temperature fluctuations.	More common in warm and moist climates.
Rocks break into fragments, causing physical changes in shape and size.	Rocks undergo chemical changes, often leading to the formation of new minerals or dissolution of minerals.