Wind – Flashcards
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Particles of clay and silt eroded and deposited by the wind are called
a.
till.
b.
loess.
c.
dust.
d.
sod.
answer
B. Loess
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Stronger wind can carry larger particles of sediment.
TRUE OR FALSE
answer
TRUE
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process by which sand dunes are formed is what?
answer
Deposition
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what is fine sediment?
answer
Loess
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Abrasion can polish rock surfaces.
TRUE OR FALSE
answer
TRUE
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Which of the following processes is a type of wind erosion?
a.
plucking
b.
abrasion
c.
inflation
d.
chemical weathering
answer
B. Abrasion
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The weakest agent of erosion
a.
water
c.
chemical weathering
b.
heat
d.
wind
answer
D. Wind
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Wind carrying sand grains deposits the sand when the wind
a.
speeds up.
b.
crosses a depression in the ground.
c.
slows down or hits an obstacle.
d.
cools after nightfall.
answer
C. Slows down or hits an obstacle
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The oddly shaped stone shapes seen in deserts are the result of wind erosion.
TRUE OR FALSE
answer
TRUE
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main mechanism of wind erosion is called what?
answer
deflation
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Sand dune
answer
A deposit of wind-blown sand
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Deflation
answer
Wind erosion that removes surface materials
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Loess
answer
Fine, yellowish-brown topsoil made up of particles of silt and clay, usually carried by the wind.
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At what time of day would you be most likely to find that the air over water is significantly warmer than the air over land nearby?
A. 5:00 AM
B. 11:00 AM
C. 4:00 PM
D, 9:00 PM
answer
A. 5:00 AM
question
Which of the following statements is false?
A. Air temperatures over the ocean remain fairly constant throughout the 24 hour cycle
B. Air temperatures over the land can vary significantly throughout the day
C. Air temperatures over the land reach their highest values in the mid-afternoon.
D. Air temperatures over land are always higher than air temperatures over the ocean.
answer
D. Air temperatures over land are always higher than air temperatures over the ocean.
question
At 3:15 one afternoon, the temperature over the land reaches its highest value for the day — about 89°F. The temperature over the adjacent water is about 72°F. What would the expected weather conditions be at this time?
A. Cloudy skies and a sea breeze
B. Clear skies and a sea breeze
C. Clear skies and a land breeze
D. Cloudy skies and a land breeze.
answer
A. Cloudy skies and a sea breeze
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As you sit on the beach, you notice that the breeze, which had been blowing toward the water from the land, shifts so that it is blowing off the water toward land. What event has just occurred?
A. Clouds have begun to form over the water
B. The temperature over the land has reaches its highest point for the day.
C. The temperature over the land has become higher than the temperature over the water
D. The temperature over the water has become higher than the temperatures over the land.
answer
C.
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The main way that the wind erodes the land is by the process of ____________________.
answer
Deflation
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Wind is the ____________ (strongest/weakest) agent of erosion.
answer
Weakest
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Loess is sediment made up of fine particles of silt that have been deposited far from their source by ____________________.
answer
Wind
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Describe the processes of deflation.
answer
As wind blows over the ground it picks up small particles of sediment in the process of deflation.
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Identify the two types of wind erosion.
answer
There are deflation and abrasion.
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Describe how the size of sediment particles affects their movement during deflation.
answer
The more energy that wind has, the larger particles of sediment it can move. In general, small, fine particles can be picked up and blown through the air. Medium sized particles bounce and skip along the ground. And large particles slide and roll along the ground.
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Sand dunes are formed by ____________ (deflation/deposition).
answer
Deposition
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The stronger the wind, the larger the particles it _____________ (deposits/erodes).
answer
Erodes
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What are two features that form though wind deposition?
answer
Sand dunes and loess deposits form through wind deposition.
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Explain the formation and movement of sand dunes.
answer
When wind carrying sand slows down or is trapped by some obstacle, such as a boulder or plant, the sand gets deposited. As the sand accumulates, a sand dune can form. Dunes often form on beaches or in deserts. Sand dunes move over time as, little by little, sand grains get moved by the wind from one side of the dune to the other.
