Chemical Weathering
Earth Science - Middle School
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Chemical Weathering © Copyright NewPath Learning. All Rights Reserved. 94-4546 Visit www.newpathlearning.com for Online Learning Resources. Some photos courtesy of NPS. What Is Chemical Weathering? Chemical weathering involves the breaking down of rocks by chemical reactions. The three main chemical reactions that decompose rocks are acid reactions, oxidation and hydrolysis. Natural Chemical Weathering Acid-producing lichen and tree roots that eat through rock are natural sources of chemical weathering. Many minerals are also relatively unstable and deteriorate in the presence of water and natural chemicals. acid reaction oxidation hydrolysis limestone cave immersed rocks rust acid reaction oxidation hydrolysis chemical weathering (hydrolysis) granite lichen tree roots clay Chemical Weathering & Pollution Chemical weathering can be caused by pollution. Acid rain, created by the burning of fossil fuels, dissolves some types of rocks such as limestone. effects of acid rain The feldspar found in granite breaks down into clay.
Pause and Review Use the terms in the list below to complete the graphic organizer. Terms: exfoliation, oxidation, abrasion, growing tree roots, acid rain, frost wedging, ocean waves, wind, hydrolysis Chemical Weathering © Copyright NewPath Learning. All Rights Reserved. 94-4546 Visit www.newpathlearning.com for Online Learning Resources. WEATHERING MECHANICAL CHEMICAL the terms in the list below to fill in the graphic organizer. Then, give a brief description the different soils typical of the environments listed under SOIL. exfoliation, glaciers, abrasion, frost wedging, ocean waves, wind, acid rain, acid tree roots, karst topography acid from tree roots glaciers Copyright © NewPath Learning. All rights reserved. of Rocks & Soil Formation glaciers acid from tree roots
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