Unit 3 pp #5 6th grade

Section2 Wind Erosion and Deposition Chapter 17 The Process of Wind Erosion ,[object Object]

Moving sand grains knock into one another, bounce up into the air, fall forward, and strike other sand grains, causing them to roll and bounce forward.,[object Object]

Deflation may cause desert pavement, which is a surface consisting of pebbles and small broken rock.

Scooped-out depressions in the landscape are called deflation hollows.,[object Object]

Abrasion commonly happens in areas where there are strong winds, loose sand, and soft rocks.

The blowing of millions of sharp sand grains creates a sandblasting effect, helping erode, smooth, and polish rocks.,[object Object]

Because wind can carry fine-grained material much higher and farther than it carries sand, loess deposits are often found far from their source.,[object Object]

Section2 Wind Erosion and Deposition Chapter 17 Wind-Deposited Materials, continued ,[object Object]

The mounds of wind-deposited sand are calleddunes.A dune moves as a result of the action of the wind.,[object Object],[object Object]

Mass movement is the movement of any material, such as rock, soil, or snow, down a slope.,[object Object]

The angle of repose varies with the type of surface material. Characteristics such as size, weight, shape, and moisture level determine the angle of repose.,[object Object]

Mass movements, like rock falls, happen suddenly and rapidly, and can be very dangerous.,[object Object]

The most common type of landslide is a slump. Slumping occurs when a block of material moves downslope over a curved surface.,[object Object]

Mudflows commonly happen in mountainous regions when a long dry season is followed by heavy rains.,[object Object]

On volcanoes with snowy peaks, an eruption can suddenly melt a great amount of ice. Water from the ice liquefies the soil and volcanic ash to produce a hot mudflow that rushes downslope.,[object Object]

Unit 3 pp #5 6th grade

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Unit 3 pp #5 6th grade