Chemical vs Mechanical

Mosses growing on the surface of rocks, producing pits in the rocks.

• Mechanical Weathering

• Chemical Weathering

The wedging of tree roots along natural joints in granite outcrops

• Mechanical Weathering

• Chemical Weathering

Limestone dissolved by carbonic acid

• Mechanical Weathering

• Chemical Weathering

The oxidation of minerals that contain iron.

• Mechanical Weathering

• Chemical Weathering

Animal burrowing dug in rock that let in water and air.

• Mechanical Weathering

• Chemical Weathering

• Both Mechanical and Chemical Weathering

Repeated freezing and thawing of water that cracks rock.

• Mechanical Weathering

• Chemical Weathering

• Both Mechanical and Chemical Weathering

The action of water, salt, and air on car fenders and panels.

• Mechanical Weathering

• Chemical Weathering

• Both Mechanical and Chemical Weathering

Acids from plant roots which break up rocks.

• Mechanical Weathering

• Chemical Weathering

• Both Mechanical and Chemical Weathering

Formation of potholes in streets during severe winters

• Mechanical Weathering

• Chemical Weathering

• Both Mechanical and Chemical Weathering

Lifted sections of sidewalk along tree-lined streets.

• Mechanical Weathering

• Chemical Weathering

• Both Mechanical and Chemical Weathering