PPT-UNIT 9 : WEATHERING AND SOIL DEVELOPMENT

After Unit 9 you should be able to Accurately identify common types of weathering Understand what types of weathering are associated with certain climatic conditions Be able to identify resistances to weathering in bedrock diagrams. Chapter 7 –Weathering and Erosion. Objectives:. Distinguish between weathering and erosion. Identify physical variables that cause mechanical weathering. Identify chemical variables that cause chemical weathering. Rose . AnnAgo. IV-6 . BEEd. WHITTLING . WIND . Bryce Canyon in Utah is a weathering wonder. Weathering and erosion have whittled away the rocks there for millions of years.. Today . huge hoodoos rise from the canyon floor. Hoodoos are rock pillars with shapes on their tops. They tower nearly 610 meters (2,000 feet) above the ground.. W. ater. Chapters 10, 11, & 12. Breaking down rocks by physical means, like . ice, wind, water, gravity, and plants/animals. Ice wedging. occurs when water squeezes into cracks in rocks, freezes, expands, and cracks the rock open. Physical Weathering. Weathering. is the breakdown of rock or soil. . Physical . weathering occurs when natural forces, such as wind, running water, and moving ice, physically break up rock and soil into smaller particles. . Chapter 7. Section 7.1 Weathering. Weathering is the process by which rocks on or near Earth’s surface break down and change. . Erosion is the removal and transport of weathered material from one location to another.. Weathering. Weathering is the process that breaks down rock and other substances at the Earth’s surface. . Heat, cold, water, and ice all contribute to weathering.. Repeated freezing and thawing for example can crack rock apart into smaller pieces. . Erosion. The carrying weathered rock from one location to another . Mechanical Weathering. Rock is physically broken down. Smaller pieces have same composition. Chemical Weathering. Rock is chemically broken down. Weathering. Chemical Weathering. Hydration: chemical reaction that consumes H. 2. O [ 2KAlSi. 3. O. 8. 2H. 2. CO. 3. H. 2. O = Al. 2. Si. 2. O. 5. (OH). 4. 4SiO. 2. 2K. . 2HCO. 3. -. ]. Predict how weathering might reshape surface features (topography). Weathering and Erosion. The top part of the lithosphere—the earth’s surface—changes as rocks are broken down to smaller pieces and carried away.. Unit 7 notes. Weathering. What is it?. Disintegration and Decomposition of rocks . Where does it happen?. At or near the surface of the Earth. Weathering. What does this process look like?. Weathering. Geomorphology (. GEO 301). Geology and Geophysics Department. College of Science. King Saud University. WEATHERING PROCESSES. Weathering is the breakdown of rocks by . mechanical disintegration . and chemical decomposition.. The soil is the upper layers of the . regolith. that is accumulated materials of weathering product and thus supports plant growth. . Weathering Products. : . Product of weathering is . regolith. or . After reading this module, you should be able to. . U. nderstand . how weathering and erosion occur and how they contribute . to element . cycling and soil formation.. E. xplain . how soil forms and describe its characteristics.. What processes cause this to happen?. What can you say about the speed of these processes?. Inference Point. Rockies. 80 milllion years old. Appalachians. 480 million years old. Soil: the foundation for agriculture.