Question 1

Natural levees are constructed of machine-compacted sand and mud; artificial levees are made of concrete.

Accepted Answer

A) True 
 B)False

Question 2

________ are characteristics of downcutting streams and a youthful stage of valley evolution.

Accepted Answer

A)  Rapids and whitewater
B)  Wide floodplains
C)  U-shaped, cross-valley profiles
D)  Meandering channels and natural levees

Question 3

________ flow is how runoff moves initially across the ground.

Accepted Answer

The answer of ________ flow is how runoff moves initially...

Question 4

The bottom of a stream's channel is called its ________.

Accepted Answer

The answer of The bottom of a stream's channel is...

Question 5

A(n) ________ is a curved lake on a low gradient floodplain formed from the abandoned channel after a meander loop is cut off.

Accepted Answer

A)  gooseneck
B)  snakebelly
C)  drooping johnson
D)  oxbow

Question 6

Where would you find clays and silts in delta sediments?

Accepted Answer

A)  bottomset beds
B)  distributary channels
C)  foreset beds
D)  topset beds

Question 7

Foreset beds are part of a deltaic, depositional sequence.

Accepted Answer

A) True 
 B)False

Question 8

Which one of the following statements is true concerning natural levees?

Accepted Answer

A)  depositional features formed at times of low discharge
B)  mostly fine sand and silt that build up during floods
C)  erosional features left behind when meander cutoff occurs
D)  form the high, steep banks of a downcutting stream

Question 9

Alluvial fans develop at unusual locations where stream gradients abruptly increase for a short distance.

Accepted Answer

A) True 
 B)False

Question 10

What would cause a river to have a series of terraces lying at different elevations, all above its modern floodplain?

Accepted Answer

A)  agrarian alien visitors in the geologic past constructing paddies
B)  deranged drainage patterns
C)  incision due to uplift or lowered base level
D)  progressive decreases in rainfall in its headwaters

Question 11

Braided streams commonly form when their sediment loads exceed their competence or capacity.

Accepted Answer

A) True 
 B)False

Question 12

________ is an abandoned, cutoff, meander loop.

Accepted Answer

A)  A horsetail
B)  An oxbow
C)  A yazoo
D)  A gatorback

Question 13

For the same discharge, gradient, and channel cross section, a stream with a boulder-strewn bed would be more turbulent than one with a sandy bed.

Accepted Answer

A) True 
 B)False

Question 14

A ________ stream pattern develops on lands underlain by tilted or folded, alternating hard and soft, sedimentary strata.

Accepted Answer

A)  dendritic
B)  radial
C)  trellis
D)  rectangular

Question 15

A natural, meandering, river channel is modified into a more or less straight and smooth, canal-like channel.Which of the following statements is correct?

Accepted Answer

A)  The natural channel had a lower gradient and less friction than the modified channel.
B)  The straight channel has a higher gradient and more friction than the natural channel.
C)  The natural channel had a lower gradient and higher friction than the straight channel.
D)  There was no change in gradient or friction.

Question 16

Where is erosion concentrated along a meandering stream?

Accepted Answer

A)  on the straight channel segments that connect the meander loops
B)  on the outer parts of the meander loops or bends
C)  at the unconsolidated point bars
D)  on the inner banks of the meander loops

Question 17

What cycle describes water moving through Earth's hydrosphere?

Accepted Answer

The answer of What cycle describes water moving through Earth's...

Question 18

A radial drainage pattern would most likely develop ________.

Accepted Answer

A)  on an active, growing volcano
B)  in areas underlain by horizontal strata
C)  in areas where the bedrock is cut by sets of fractures at right angles
D)  in areas of folded and tilted strata with varying resistances to erosion

Question 19

Alluvium refers to all solid unconsolidated stream deposits, mainly sand and gravel.

Accepted Answer

A) True 
 B)False

Question 20

Briefly compare those stream characteristics that decrease in a downstream direction with those that increase downstream.Also, indicate whether these changing stream characteristics tend to favor erosion or deposition of sediments.

Accepted Answer

Gradient, turbulence, bed roughness gene...

Exam 15: Running Water

Natural levees are constructed of machine-compacted sand and mud; artificial levees are made of concrete.

Correct AnswerverifiedShow Answer

Where would you find clays and silts in delta sediments?

Correct AnswerverifiedShow Answer

Braided streams commonly form when their sediment loads exceed their competence or capacity.

Correct AnswerverifiedShow Answer

Alluvial fans develop at unusual locations where stream gradients abruptly increase for a short distance.

Correct AnswerverifiedShow Answer

A radial drainage pattern would most likely develop ________.

Correct AnswerverifiedShow Answer

________ are characteristics of downcutting streams and a youthful stage of valley evolution.

Correct AnswerverifiedShow Answer

A natural, meandering, river channel is modified into a more or less straight and smooth, canal-like channel.Which of the following statements is correct?

Correct AnswerverifiedShow Answer

Which one of the following statements is true concerning natural levees?

Correct AnswerverifiedShow Answer

For the same discharge, gradient, and channel cross section, a stream with a boulder-strewn bed would be more turbulent than one with a sandy bed.

Correct AnswerverifiedShow Answer

Where is erosion concentrated along a meandering stream?

Correct AnswerverifiedShow Answer

Foreset beds are part of a deltaic, depositional sequence.

Correct AnswerverifiedShow Answer

________ is an abandoned, cutoff, meander loop.

Correct AnswerverifiedShow Answer

The bottom of a stream's channel is called its ________.

Correct AnswerverifiedShow Answer

What cycle describes water moving through Earth's hydrosphere?

Correct AnswerverifiedShow Answer

A ________ stream pattern develops on lands underlain by tilted or folded, alternating hard and soft, sedimentary strata.

Correct AnswerverifiedShow Answer

A(n) ________ is a curved lake on a low gradient floodplain formed from the abandoned channel after a meander loop is cut off.

Correct AnswerverifiedShow Answer

Alluvium refers to all solid unconsolidated stream deposits, mainly sand and gravel.

Correct AnswerverifiedShow Answer

What would cause a river to have a series of terraces lying at different elevations, all above its modern floodplain?

Correct AnswerverifiedShow Answer

________ flow is how runoff moves initially across the ground.

Correct AnswerverifiedShow Answer

Briefly compare those stream characteristics that decrease in a downstream direction with those that increase downstream.Also, indicate whether these changing stream characteristics tend to favor erosion or deposition of sediments.

Correct AnswerverifiedGradient, turbulence, bed roughness gene...View AnswerShow Answer

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Gradient, turbulence, bed roughness gene...
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