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Types of Weathering Agent of Weathering Air (Oxidation) Type of Weathering Chemical Weak Acids- Chemical Secretes a weak acid that breaks down the rock Water (Acid precipitation) Chemical Forms when fossil fuels are burnt creating pollution Plants Mechanical Plant roots looking for water and nutrients break down the rock Ice (Ice Wedging) Mechanical Water acts as a wedge by freezing and thawing to break the rock Water, Wind, Gravity Mechanical The scraping or grinding of rock on another rock to break it down (Living things- lichen) (Abrasion) What happens?? Iron interacts with oxygen and water Picture Name__________________________ Weathering (in more detail) Instructions: Use pages 278-283 in the book to fill in the information below related to weathering. Then use the same pages to fill in the chart on the back. Weathering: the process by which rock materials are _broken__________ down by the action of _physical__ (mechanical) or chemical processes. Mechanical weathering: the breakdown of rock into smaller _pieces______________ by ___physical_____________ means o The agents or causes of mechanical weathering include ____ice_______, _____wind____, _____water__________, gravity, _____plants________and even ___animals______________. Chemical Weathering: the process by which rocks ___breaks____ down as a result of __chemical_____________ reactions. o Common agents or causes of chemical weathering are __water_______, weak __acids________, and _air___