Mechanical Weathering © Copyright NewPath Learning. All Rights Reserved. 94-4545 Visit www.newpathlearning.com for Online Learning Resources. Some photos courtesy of USGS & NPS. Abrasion & Plant Gr owth There are many examples of mechanical weathering of rocks. Abrasion occurs when one rock grinds against another. A rock can also break when plant roots grow into cracks on its surface. abrasion plant roots Exfoliation & Fr ost Wedging Exfoliation is a repeated cycle during which rocks expand in the daytime heat and contract at night, causing rocks to flake. exfoliation frost wedging abrasion plant roots Frost wedging occurs when cracks fill with water and undergo a repeated cycle of freezing and thawing, causing rocks to crack apart.
Pause and Review Use the terms in the list below to complete the graphic organizer. Terms: exfoliation, oxidation, abrasion, acid rain, frost wedging, ocean waves, wind, acid from tree roots Mechanical Weathering © Copyright NewPath Learning. All Rights Reserved. 94-4545 Visit www.newpathlearning.com for Online Learning Resources. growing plant roots hyrolysis 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 hydrolysis growing plant roots Copyright © NewPath Learning. All rights reserved. of Rocks & Soil Formation