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Types of Weathering

Science, Grade 3

 
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© Copyright NewPath Learning. All Rights Reserved. 94-4347 Visit www.newpathlearning.com for Online Learning Resources. Types of Weathering Some photos courtesy of USGS and USFWS. There are two types of weathering - physical and chemical. Physical Weathering Physical weathering takes place when water and ice break rocks down into smaller pieces. This happens by freezing and thawing. Physical weathering only changes the size of the rock. Plant roots and burrowing animals can also cause physical weathering. Chemical Weathering Chemical weathering not only changes the size of rocks but also causes them to change into different materials. During chemical weathering the rocks are broken down by the actions of chemicals in the air or water. granite granite sand/silt/clay water rusting (oxidation) chemical leaching
© Copyright NewPath Learning. All Rights Reserved. 94-4347 Visit www.newpathlearning.com for Online Learning Resources. Types of Weathering Pause & Review Identify the following examples as either physical or chemical weathering. ________________________ ________________________ water (leaching) acid rain ________________________ ________________________ burrowing animal rust ________________________ ________________________ plant roots freezing & thawing