Question 1

Relative to dune movement and form,a dune's slipface forms on which side?

Accepted Answer

A) leeward side 
B) windward side 
C) freedune side 
D) stoss 
E) topside

Question 2

Gibber plain,gobi,and serir are regional names for the same type of desert surface.

Accepted Answer

A) True 
 B)False

Question 3

As deltas are depositional features of fluvial processes,so ________ are depositional features of eolian (wind)processes.

Accepted Answer

A) canyons 
B) landslides 
C) moraines 
D) dunes

Question 4

Describe the processes of eolian transportation.

Accepted Answer

The answer of Describe the processes of eolian transportation....

Question 5

Playas are likely to contain ________ concentrations of salt because ________.

Accepted Answer

A) high of evaporation of water containing dissolved salts 
B) high salt domes are exposed when playas are formed by erosion 
C) low large amounts of fresh groundwater dilute the salt concentration 
D) low large amounts of freshwater runoff from surrounding mountains dilutes the salt concentration

Question 6

The major erosional force in the desert is

Accepted Answer

A) wind. 
B) the eolian process. 
C) water and fluvial processes. 
D) human activity. 
E) periglacial activity.

Question 7

Which is true of the issues surrounding the use of Colorado River water?

Accepted Answer

A) the 1999-2007 drought was the same as any seen in the historical record. 
B) inflow to Lake Powell and Mead normal. 
C) It would take 13 winters with normal snow pack to "reset" the Colorado River system. 
D) Arizona's population doubled from 1990-2007,but water demand was met with conservation measures. 
E) Recent efforts have focused exclusively on reducing demand for water.

Question 8

California is not allowed to take water from the Colorado River.

Accepted Answer

A) True 
 B)False

Question 9

Because air has a ________ density than water,saltating particles in an eolian environment strike one another with ________ force than do saltating particles in a stream.

Accepted Answer

A) higher more 
B) higher less 
C) lower more 
D) lower less

Question 10

The impact of saltating particles acts to

Accepted Answer

A) initiate the movement of other particles. 
B) suppress the movement of other particles. 
C) aggrade surfaces. 
D) roughen surfaces 
E) create surface tension.

Question 11

Wind erosion of soil

Accepted Answer

A) is not a problem in Canada. 
B) will be unaffected by climate change. 
C) can be significant,even from a single storm. 
D) results from variations in wind,but is unaffected by surface configuration and soil factors. 
E) results from a single factor - increased wind speed means more soil loss.

Question 12

Wind is ________ effective at eroding and transporting materials compared to other geomorphic agents because ________.

Accepted Answer

A) more it reaches higher velocities 
B) more it can carry more material 
C) less it does not erode to base level. 
D) less is less dense than other materials 
E) equally although it is less dense,it has a greater capacity.

Question 13

The suspension of finer particles by wind over significant distances is a phenomenon known as

Accepted Answer

A) a yardang. 
B) a dust storm. 
C) saltation. 
D) surface creep. 
E) arroyo.

Question 14

Water is a more effective agent of erosion in deserts than wind.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following dune types is correctly matched with the conditions necessary for its formation?

Accepted Answer

A) barchan - abundant sand supply 
B) transverse - limited sand supply 
C) parabolic - vegetation controlled 
D) crescentic - bidirectional wind 
E) longitudinal - multi-directional wind

Question 16

Wind-blown loess deposits are only derived from glacial and periglacial sources.

Accepted Answer

A) True 
 B)False

Question 17

The amount of Colorado River water allocated to various states was based on an overestimate of the typical average annual discharge consequently,there is not enough water available to meet the allocation requirements.

Accepted Answer

A) True 
 B)False

Question 18

Linear dunes and seif dunes are oriented

Accepted Answer

A) parallel to the wind. 
B) perpendicular to the wind. 
C) randomly in relation to wind direction.

Question 19

Increased aridity

Accepted Answer

A) will not affect Canada because we have an abundant supply of water. 
B) will cause a reactivation and movement of sand dunes in Canada's prairie provinces. 
C) is not forecast to occur in Canada. 
D) will increase area available for agriculture as the boreal forest shifts northward. 
E) will improve soil quality in southern Saskatchewan.

Question 20

Small particles are difficult for wind to move because

Accepted Answer

A) although they are small,they have a higher density than many of the larger sized particles in a desert environment. 
B) they are aerodynamic. 
C) they tend to be cohesionless. 
D) their small size creates a wind shadow that prevents the wind from transporting them. 
E) their shape reflects wind energy.

Exam 15: Eolian Processes and Arid Landscapes

Relative to dune movement and form,a dune's slipface forms on which side?

Gibber plain,gobi,and serir are regional names for the same type of desert surface.

As deltas are depositional features of fluvial processes,so ________ are depositional features of eolian (wind) processes.

Describe the processes of eolian transportation.

Playas are likely to contain concentrations of salt because .

The major erosional force in the desert is

Which is true of the issues surrounding the use of Colorado River water?

California is not allowed to take water from the Colorado River.

Because air has a density than water,saltating particles in an eolian environment strike one another with force than do saltating particles in a stream.

The impact of saltating particles acts to

Wind erosion of soil

Wind is effective at eroding and transporting materials compared to other geomorphic agents because .

The suspension of finer particles by wind over significant distances is a phenomenon known as

Water is a more effective agent of erosion in deserts than wind.

Which of the following dune types is correctly matched with the conditions necessary for its formation?

Wind-blown loess deposits are only derived from glacial and periglacial sources.

The amount of Colorado River water allocated to various states was based on an overestimate of the typical average annual discharge consequently,there is not enough water available to meet the allocation requirements.

Linear dunes and seif dunes are oriented

Increased aridity

Small particles are difficult for wind to move because