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What Factors Affect Weathering? 1. Climate • Temperature – Warmer climates have more chemical weathering – Colder climates tend to have more physical weathering •Moisture -As moisture increases, weathering will increase • What conditions create the strongest mechanical weathering? 2. Surface Area Exposed • When a larger rock is broken into smaller pieces, more surface area will be exposed • Weathering rate will increase as exposure to the atmosphere increases What is the surface area of the cube below? Answer = 24cm2 What would the total surface area be if the cube was cut in half in all directions? 48cm2 3. Composition of Rock • Different rocks respond in different ways to the same weathering processes – Harder minerals such as quartz have more resistance to weathering – Some minerals such as feldspar, calcite and gypsum are more affected by both mechanical and chemical weathering Limestone is not resistant to weathering.
