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Ch.9 (Exam 3)
Wasting
| Question | Answer |
|---|---|
| Heavy irrigation on a hillslope will cause __. | All of the answers are correct |
| Assuming that all other conditions are identical, a slope that is ___ is more stable. | more gently inclined |
| Among techniques used to prevent rockfalls along highways is to _____. | All of the answers are correct |
| The rate of movement in creep is usually __. | a centimeter or less per year |
| A(n) apron of fallen rock fragments called ___ is generally found at the base of a slope affected by rockfall. | talus |
| When soil is saturated with water ____ increases. | pore pressure |
| In ____, soil in which fine grains predominate moves downslope as a viscous fluid. | earthflows |
| A(n) _____ is the rapid sliding of a mass of bedrock along an inclined surface of weakness. | rockslide |
| ______ is ground that remains frozen for many years. | Permafrost |
| In areas where the daily temperature regularly varies above and below the freezing temperature of water, the freeze-thaw cycle __. | All of the choices are all correct |
| _____ commonly trigger mass wasting events. | Earthquakes |
| ____ generally makes a slope more susceptible to mass wasting of soil. | Construction |
| When a stream, wave action, or excavation by humans undercuts the base of a slope, slope failure may occur because __. | downslope support of the slope materials will have been reduced or eliminated |
| Mudflows are ___ likely to occur in arid regions than in wet climates | more |
| Two factors that contribute significantly to soil creep are water in the soil and ___. | freeze-thaw cycles |
| If, over a period of time, your home develops doors that stick, cracked walls, broken pipes, and cracked driveways, ____ may be occurring. | soil creep |
| Mudflows generally contain __. | primarily mud-sized particles with some water, but may also contain particles as large as boulders |
| A(n) _____ is a general term that tells nothing about the processes involved. | landslide |
| If movement becomes very rapid, a rockslide may break up and become __. | a rock avalanche |
| List the following flow terms in the order of decreasing velocity (fastest first): mudflow, debris avalanche, creep, and earthflow. | debris avalanche, mudflow, earthflow, creep |
| One way to prevent slope failure is to __. | All of the answers are correct. |
| Which of the following factors are how geologists, engineers, and others classifying mass wasting? | rate of movement, type of material, type of movement |
| Shear strength __. | is the total force/stress resisting movement |
| In a translational slide, the descending mass __. | moves along a plane approximately parallel to the slope of the surface |
| Resistance to movement or deformation of soil is called __. | shear strength |
| A rock avalanche begins its downslope journey __. | as bedrock |
| A _____ involves movement along a curved surface. | rotational slide |
| Mudflows are ___ likely to occur in areas not protected by vegetation. | more |
| Slide is a term that means that the descending mass __. | remains intact |
Created by:
Thomas.Siu
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