Quiz #12 on weathering
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Two types of weathering
Chemical and mechanical
Examples of chemical weathering
Acid rain, water, carbon dioxide/carbonic acid
Examples of mechanical weathering
Abrasion, ice wedging
Chemical weathering
Rock broken down through chemical changes, faster
Mechanical weathering
Rock physically broken down, slower
Weathering
Breakdown of rock and other substances at Earth’s surface
What factors affect the rate at which materials break down?
Climate, type of material, surface area
Erosion
Movement of sediment by wind/water/ice/gravity
Climate in southwest US
Hot and dry
Climate in northeast US
Cold and wet
Weathering in a hot and dry climate
Very slight, mostly abrasion and rocks are smoothed by wind
Weathering in a cold and wet climate
More jagged/rough rocks