The breakdown of rocks into smaller particles.

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Presentation transcript:

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

Surface Area

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

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

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

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

Physical Weathering Animals = Ants / Worms Humans

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

Oxidation

Hydrolysis

Carbonation

Salt (Honeycomb)