The shear strength is an objects resistance to movement that needs to be overcome in order to make it move. Ensure that you have accessed the resources denudation, weathering and mass wasting to be certain that you are adequately prepared for this quiz. Weathering, soil, erosion, and mass movement unit plan. Mass wasting is the downslope movement of masses of earth materials. Weathering, soil, and mass wasting flashcards quizlet. Define and describe the processes of weathering and erosion, including examples of negative and beneficial effects of these processes. Explain the main influences of weatherdetermine the main influences of mass wasting. It occurs when soil or rocks are carried away, not by wind or water, but by falling or sliding downwards. This form of mass wasting is so slow that it cannot be observed with the naked eye. Mass wasting represents the downslope movement of material under the influence of gravity. Weathering and mass wasting weathering sedimentary rock.
Solute sources and weathering rates in the central rocky mountains gregory holk, geochemistry, isotope geology, metamorphic core complexes thomas kelty, structural geology. In the process they act as a wedge, widening and extending the cracks. Plan and carry out an investigation that demonstrates how surface water and groundwater act as the major agents of physical and chemical weathering. Weathering, mass wasting, and erosion 1 weathering, mass wasting, and erosion in previous chapters we discussed the internal processes that create relief. The chief products of chemical weathering are stable quartz, clay minerals and dissolved minerals. The general term landslide is used to describe all rapid forms of mass wasting. Describe the various types of mass wasting processes. Erosion is the removal of sediments by natural processes e. Mechanical weathering no change in rock composition big. What is the difference between weathering and mass wasting. Use examples to explain the difference between mechanical and chemical weathering and the. Landslides, mudflows and rockfalls, all belong to this category of geomorphic processes. This is one of the central concepts of this course.
Explain the difference between weathering and mass wasting. Mass wasting can be hazardous and often results in the loss of life and property. Weathering and mass wasting weathering and mass wasting. When rocks are mechanically weathered there is no change in the chemical composition of the rock. Sep 06, 2017 weathering, mass wasting, and erosion james zollweg. Combined effects of mass wasting and running water produce stream valleys. Types and causes of mass wastingmass movement of rocks. Describe the basic processes, functions, and influences of weathering. It could be rapid snowmelt, intense rainfall, earthquake shaking, volcanic eruption, storm waves, rapidstream erosion, or human activities, such as grading a new road. Mass movement or mass wasting is a natural phenomenon initiated by the force that attracts any object with mass. Mass wasting or mass movement is the movement of a large mass of rock, soil and debris downward due to the pull of gravity.
Determine ways mass wasting processes may be limited. Mass wasting denudation generally commences with mass wasting, which is the downslope movement of weathered rock debris under gravity without the need for moving streams of water, ice or air. In recent years, the definition of mass movement has been enlarged to include mass wasting processes or natural erosion and the slow submerging of the earths ground surface. A search of the document itself finds only three standards related to weathering, mass wasting, erosion, and landscape change. This quiz tests your knowledge of weathering and mass wasting. This quiz tests your knowledge of the processes involved in weathering and mass wasting. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Mass wasting is a type of erosion that results in the mass movement of rock, soil and debris down a slope. As there are different climatic regions on the earths surface owing to thermal gradients created by latitudinal, seasonal, land and water spread variations, the exogenic geomorphic processes vary from region to region. Powerpoint as a starting point for notes over weathering, erosion, and mass wasting. Masswasting is a unique geomorphological process destabilizing the surface rocks and soil mass.
Processes and forms of mass wasting mass wasting processes can occur through four actions 1. Mechanical weathering is the breaking down of rock into smaller pieces. To introduce students to the weathering processes that shape our world and allow students to make connections between these weathering process and. Mass wasting results when the force of gravity acting parallel to a slope exceeds the strength of that slope. Weathering, mass wasting, and erosion james zollweg. Weathering and mass wasting quiz ensure that you have accessed the resources denudation, weathering and mass wasting to be certain that you are adequately prepared for this quiz. This type of weathering occurs in areas where the temperature fluctuates around zero degrees celsius. Answers weathering is the breaking down and decomposition of solid rocks at or near the earths surface by physical and chemical processes without movement while mass wasting is the displacement or movement of weathered materials downslope under the influence of gravity.
This downward movement is called as mass movement or masswasting. Weathering and mass wasting partial test bank the breakup of existing surface and near surface material is. Introduction mass wasting the downslope movement of. Weathering, mass wasting, erosion, and landscape change. Weathering the disintegration and decomposition of material at or near the surface mass wasting the transfer of rock material downslope under the influence of gravity erosion the incorporation and transportation of material by a mobile agent, usually water, wind, or ice. That includes all earth materials, rock and regolith. Mass wasting may also cause physical weathering by causing rocks to shatter on hitting the ground or rub against each other while rolling and sliding. If the plugins are not installed, your web browser will either attempt to download the pdf files or offer to send you to the adobe web site to download the plugins for your browser. The degradation of the earths surface by natural processes involving agents is best called. Swelling caused by expansion of clay or through frost action types of mass wasting. These roots can extend downward, deep into rock cracks in search of water, and nutrients. Mass wasting is the failure and downslope movement of rock or unconsolidated materials in response to gravity.
Weathering is the breaking down of rock into smaller pieces or different substances. Terms in this set 99 weathering, mass wasting, and erosion are all part of what process. The term landslide is used synonymously with the term mass wasting, but they are not the same thing. Jul 28, 2015 powerpoint as a starting point for notes over weathering, erosion, and mass wasting. Learn about the process of mass wasting, the factors that must be. Increased water content within the slope is the most. Compare the difference between fast and slow subsidence. The dominant gravity vector is always directed perpendicular figure 6, vertically downward, toward earths mass center.
Place a small rock on the flat, horizontal top of a desk or lab table. Flow caused by weak internal cohesion as well as exceeding the threshold angle of repose 4. Weathering and mass wasting free download as powerpoint presentation. Chapter 4 weathering and soil western oregon university. The national map of mass wasting activity shows areas with greatest potential for. Weathering, soil, and mass wasting after reading and studying ch. If your web browser has the proper plugin installed, clicking on the pdf will bring the file into your web browser from which you can then print the notes.
Mass wasting, erosion, and weathering powerpoint teaching. Most often the culprit ofbiotic weathering are plant roots. When earth material moves down a hillside as a fluidlike mass, it is called an earthflow. Notes on sedimentary rocks, weathering and erosion. Sep 27, 2011 weathering, erosion, and mass wasting slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. External processes are a basic part of the rock cycle because they are responsible for transforming solid rock into sediment. Varieties of these are called earthflows, mudflows, and debris avalanches. Weathering and soil external versus internal processes. This class exercise is an opportunity for students to apply textbook information about weathering and mass wasting to local and nationallyrecognized surface features, such as stone mountain ga, half dome ca, and others. Process such as weathering, mass wasting, or erosion that is powered by the sun and transforms solid rock into sediment.
Ppt weathering, mass wasting, and erosion powerpoint. Spheroidal weathering and exfoliation b differential weathering mass wasting chapter 1 factors influencing mass wasting 2 types of mass wasting table 9. These forces, though often miniscule, act over time to inexorably wear away at the. Geology introduction chapter 1 1 geologic time 2 basic tectonics 3 earth systems earths interior and geophysical properties chapter 2 1 earths internal structure a compositional view b geophysical view 2 gravity measurements 3 isostasy. Loss of life and property from mass wasting events can be prevented or mitigated by adequate assessment and planning based on geologic studies of previous occurrences. Spheroidal weathering 3 distintegration chemical weathering 1 hydrolysis and hydration 2 oxidation 3 dissolution or solution differential weathering cliff formers and slope formers examples. If you continue browsing the site, you agree to the use of cookies on this website.
Gravity pulls rocks, soils and debris on a downward slope naturally without any chemical change. These flows typically occur in humid areas on steep slopes with thick. Unit 2 test weathering erosion mass wasting multiple choice 1 mark each 1 soil creep is an example of. Loss of life and property from masswasting events can be prevented or mitigated by adequate assessment and planning based on geologic studies of previous occurrences. In this chapter we discuss the external forces at work on the landscape.
The definition excludes material transported downslope by streams, winds, or glaciers. Weathering is the break down of rocks into smaller components by atmospheric and biotic agents mass wasting is the relatively shortdistance downslope movement of broken rock material due to gravity erosion is more extensive and involves more long distance. Mass wasting refers to the downslope movement of rock, regolith, and soil under the direct influence of gravity. Weathering, mass wasting movements, erosion and transportation are included in denudation. Weathering and mass wasting weathering sedimentary. Mass wasting includes all processes by which masses of rock and soil move downslope. Jun 06, 2017 explain the difference between weathering and mass wasting. Shear strength is proportional to how solid the mass is, the density of plant roots, the amount of water present, and the roughness of the particles in the mass.
Weathering, mass wasting, and erosion are called external processes because they occur at or near earths surface and are powe red by energy from the sun. Rock falls occur when loose rock splits off of high cliffs. Mass wasting also called mass movement, is the downslope movement of materials in direct response to gravity. Research geological sciences department california. A rockslide or landslide is a common example of mass wasting, as a large quantity of loose rock or soil rolls or slides down a slope. Download pdf files physical geology, first university of. Mass wasting the downslope movement of material resulting from the force of gravity. Obtain, evaluate, and communicate information to explore the actions of water, wind, ice, and gravity as they relate to landscape change. Fall a type of movement common to mass wasting processes that refers to the free falling of detached individual pieces of any size.
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