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PCS Earth Science

Chapter 8 Review

QuestionAnswer
What alters Earth's surface over time due to gravity moving sediment and rocks downslope? mass movements
How are mass movements classified? by how rapidly they occur
What factors are involved in the mass movement of Earth materials? material's weight, its resistance to sliding, the trigger, and the presence of water
Can mass movements affect human life and activities? yes
Can human activities increase the potential for the occurrence of mass movements? yes
What modifies landscapes in all areas of the world by transporting sediment? wind
Wind is a powerful agent of ____________. erosion
How can wind transport sediment? suspension and saltation
What is formed when wind velocity slows down and windblown sand is deposited? dunes
T or F Dunes migrate as long as winds continue to blow. true
What modifies landscapes by eroding and depositing rocks? glaciers
What are large moving masses of ice that form near Earth's poles and in mountain areas called? glaciers
How can glaciers be classified? valley glaciers or continental glaciers
What features are formed by glaciers? U-shaped valleys, hanging valleys, moraines, drumlins, and kettles
What is rapid downslope movement of a mass of loose sediment called? landslide
What is rapidly flowing, often destructive mixtures of mud and water called? mudflow
What is slow, steady downhill movement of loose, weathered Earth materials called? creep
What are rock structures shaped by windblown sediments called? ventifacts
Thick, windblown, fertile deposits of silt that contain high levels of nutrients and minerals are called? loess
What occurs when particles such as sand rub against the surface of rocks? abrasion
Glaciers often form parallel scratches and grooves in bedrock because glaciers _____________. drag loose rocks over Earth's surface
Created by: Ms.Sala
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