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Weathering, Erosion, and Deposition
Transcript of Weathering, Erosion, and Deposition
Sam DeRosa Weathering, Erosion, and Deposition Weathering -The chemical and physical alterations of rock and other earth materials at or near earth's surface, through action of temperature changes, water, chemical agents, atmospheric gases and organic materials. Surface Area Climate Rock Characteristics--- Differential Weathering Erosion Deposition Works Cited Mechanical weathering reduces rocks to smaller pieces that have more surface area then the original rock body. More rock is exposed to water and oxygen which results in chemical weathering. - The process in which surface materials are worn away and transported from one place to another by agents such as gravity, water, wind and glaciers. The ideal climate for chemical weathering is one that consists of high temperatures, wet and tropical locations, and high humidity. Chemical weathering increases when temperature and amount of precipitation increases. - dropping of sediments that occurs when an agent of erosion, such as gravity, wind, or wave, loses its energy and can no longer carry it's load. Mechanical vs. Chemical Mechanical -
rocks are broken down by a physical force into smaller pieces without any change to the chemical nature of the rocks. Chemical-
repeated chemical reactions breaks apart the chemical bonds holding the rocks together causing smaller and smaller pieces. Differential weathering: when different parts of rock weather at different rates or speeds
Two causes for differential weathering:
1. A difference in mineral composition.
2. A variation in spacing and the number of cracks in different parts of a rock mass. Callister, Jeffrey C.. Earth science: the physical setting : brief review in New York. 2012 ed. Needham, Mass.: Prentice Hall, 2012. Print
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"Unit 5- Weathering and Erosion." Mr. Bova. N.p., n.d. Web. 3 May 2012. <mr-bova.wiki.williamsvillek12.org>.
"Weathering, Erosion, and Deposition." STUDYBLUE | Make online flashcards & notes. Study anywhere, anytime.. N.p., n.d. Web. 4 May 2012. <http://www.studyblue.com>.
" Weathering, Erosion, and Deposition - YouTube ." YouTube - Broadcast Yourself. . N.p., n.d. Web. 9 May 2012. <http://www.youtube.com/watch?v=oFnpm4SUF7I>.
"Weathering. The Process of Natural Decay." Welcome to blue. N.p., n.d. Web. 4 May 2012. <http://blue.utb.edu> Mechanical weathering breaks down rocks into smaller pieces Increases surface area. Increased surface area= increased rate of weathering due to more exposure to oxygen and water. Weathering-the chemical and physical change of rocks and earth's materials Ideal climate: tropical (warm, wet, humid, etc.) differential weathering can be caused by differance in mineral composition and variations of cracks in the rocks Erosion: when earth materials are worn away by agents such as gravity and water
Deposition: when the agent of erosion can no longer hold its load due to loss of energy and drops it. Review