PPT-Weathering and Mass Wasting

Earth s external processes Weathering the physical breakdown and or chemical alteration of rock at or near Earth s surface Mass wasting the transfer of rock and soil . 1 Mass Wasting The downslope movement of rock, regolith, and soil under the direct influence of gravity Gravity is the controlling force Mass WastingImportant triggering factors Causes of mass wasting. Types of mass wasting. slumps. falls . slides. flows. Mass Wasting. . –. . downslope. movement of debris in response to gravity.. http://students.washington.edu/cdcdcd/. - slopes Mass wasting Is a collective term addressing all down slope movements of weathered rock (soil) that are created by gravitational forces.Gravity is the primary component!Vocabulary ColluviumS Weathering: . The . process that breaks down rock and other substances at Earth’s surface.. Factors that contribute to weathering include:. Heat, cold, water. , ice, oxygen, and carbon dioxide. Erosion: . formation of landforms. weathering and erosion. The process of weathering and erosion are the main forces behind landscape types. . However, they are not the only reason for a plain, plateau, or a mountain region to form. . 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. . Mechanics of Mass Wasting. . An . object resting on a horizontal . surface will move only when it encounters a force acting parallel . to the . horizontal surface. . . The . force . of . gravity . Ms. Martel. Weathering. Weathering is the breakup of rock due to exposure to processes that occur at Earth’s surface.. Geologists group weathering processes under two headings, mechanical and chemical weathering. . Scenario #1. Flood water pounds against a canyon wall and wears it down.. Weathering. Scenario #2. Rain washing soil away from a hillside. Erosion. Scenario #3. Layers of sediment forming at the bottom of the ocean. 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. -. ]. Weathering can be defined as any. chemical or mechanical process by which rocks exposed to weather undergo changes in character or are broken down into smaller pieces. .. Mechanical Weathering. Mechanical Weathering. What is it?. Chronic wasting disease is a contagious, neurological disease. Currently, only deer,. . elk, and moose are susceptible to CWD. When and where did CWD start?. CWD started in 1967 with infected mule deer on a breeding farm in Colorado. . Belay ED, Maddox RA, Williams ES, Miller MW, Gambetti P, Schonberger LB. Chronic Wasting Disease and Potential Transmission to Humans. Emerg Infect Dis. 2004;10(6):977-984. https://doi.org/10.3201/eid1006.031082. What is Weathering?. The scenes of the world are continuously mutating. Sun, rain, frost, and wind are breaking down even the most solid of the rocks into smaller bits before they are taken away. This process is termed as weathering. .