How Wind Helps Shape Landscapes

Desert pavement is created as a result of

• abrasion.

• deflation.

• blowouts.

• water erosion.

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NGSS.MS-ESS2-2

Deflation affected the Dust Bowl in the 1930s by

• creating rock pinnacles.

• building up sand dunes.

• depositing loess.

• lowering the land.

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NGSS.MS-ESS2-2

Abrasion changes the desert surface by

• creating blowouts.

• cutting and polishing exposed rock surfaces.

• depositing loess across the landscape.

• creating a stony surface layer.

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NGSS.MS-ESS2-2

What causes abrasion in a desert?

• wind

• flowing water

• humidity

• friction from rocks

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NGSS.MS-ESS2-2

Windblown silt that blankets a landscape is called

• a blowout.

• a sand dune.

• desert pavement.

• loess.

When wind creates a sand dune, the sheltered side of the dune

• forms a gentle incline.

• has the same incline as the windward side.

• is steeper than the windward side.

• continues to rise higher than the windward side.

Over time, how do sand dunes tend to migrate?

• perpendicular to the movement of the wind

• in the same direction as the wind blows

• toward the wind

• in random directions

What is a sand dune that forms scalloped rows of sand at right angles to the wind?

• star dunes

• transverse dunes

• parabolic dunes

• barchanoid dunes

Tags

NGSS.MS-ESS2-2

The shape of star dunes is mostly due to

• the amount of vegetation.

• wind direction.

• wind speed.

• the amount of sand

Loose particles such as clay and silt are lifted and removed from the desert surface by a process called _______________.