Question 1

What type of stream is shown in this figure?

Accepted Answer

A)  meandering stream 
B)  braided stream 
C)  a stream whose main channel has high sinuosity 
D)  an esker 
A)  meandering stream 
B)  braided stream 
C)  a stream whose main channel has high sinuosity 
D)  an esker

Question 2

The volume of water flowing through any part of a river per unit time is calculated by:

Accepted Answer

A)  multiplying the velocity by the cross-sectional area of the river 
B)  multiplying the velocity times the length of the river 
C)  dividing the channel's width by its velocity 
D)  dividing the channel's length by its cross-sectional area 
A)  multiplying the velocity by the cross-sectional area of the river 
B)  multiplying the velocity times the length of the river 
C)  dividing the channel's width by its velocity 
D)  dividing the channel's length by its cross-sectional area

Question 3

Which of the following is commonly associated with tributaries?

Accepted Answer

A)  rapids when the tributary joins the main river 
B)  delivery of sediment to the main river 
C)  an increase in the discharge in the main river 
D)  all of these 
A)  rapids when the tributary joins the main river 
B)  delivery of sediment to the main river 
C)  an increase in the discharge in the main river 
D)  all of these

Question 4

What happens to water velocity downstream? It generally:

Accepted Answer

A)  Decreases 
B)  remains the same 
C)  increases 
D)  there is no way to tell because discharge cannot be determined 
A)  Decreases 
B)  remains the same 
C)  increases 
D)  there is no way to tell because discharge cannot be determined

Question 5

Which of the features on this aerial photograph is a cutbank?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
A)  A 
B)  B 
C)  C 
D)  D

Question 6

Which of the lettered sites would most likely be undercut by migration of a meander?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
A)  A 
B)  B 
C)  C 
D)  D

Question 7

Use the following information to calculate the gradient of River X. If the vertical change is 10 meters in 1 kilometer, then the gradient expressed in m/km is:

Accepted Answer

A)  1 
B)  10 
C)  100 
A)  1 
B)  10 
C)  100

Question 8

In mountain streams that are steep with high stream velocities, which pattern of erosion is the most common?

Accepted Answer

A)  Channel bed is eroded faster than the channel sides 
B)  Channel sides are eroded faster than channel bed 
C)  Channel bed and channel sides are eroded equally 
A)  Channel bed is eroded faster than the channel sides 
B)  Channel sides are eroded faster than channel bed 
C)  Channel bed and channel sides are eroded equally

Question 9

Which of the following is unlikely to cause deposition of sediment along a stream?

Accepted Answer

A)  a decrease in gradient 
B)  a decrease in water velocity 
C)  a drop in sea level 
D)  none of these 
A)  a decrease in gradient 
B)  a decrease in water velocity 
C)  a drop in sea level 
D)  none of these

Question 10

Compared with curve 2 on this hydrograph, what is a possible explanation for curve 1?

Accepted Answer

A)  the basin for curve 1 has steeper slopes than the basin for curve 2 
B)  the storm recorded by curve 1 was shorter and more intense than the storm represented by curve 2 
C)  curve 1 shows the same area as curve 2 but after urbanization 
D)  all of these are possible 
A)  the basin for curve 1 has steeper slopes than the basin for curve 2 
B)  the storm recorded by curve 1 was shorter and more intense than the storm represented by curve 2 
C)  curve 1 shows the same area as curve 2 but after urbanization 
D)  all of these are possible

Question 11

Bedrock and sediment in a stream is most susceptible to erosion if it is:

Accepted Answer

A)  in slow-moving water in an eddy 
B)  in a site that is sheltered from oncoming clasts 
C)  located in a turbulent part of the river 
D)  composed entirely of large clasts that affect stream flow 
E)  all of these 
A)  in slow-moving water in an eddy 
B)  in a site that is sheltered from oncoming clasts 
C)  located in a turbulent part of the river 
D)  composed entirely of large clasts that affect stream flow 
E)  all of these

Question 12

How did the entrenched meanders shown in this figure form?

Accepted Answer

A)  rising seas flooded a meandering river valley 
B)  the land subsided and the river deposited sediment 
C)  a meandering river carved into the land due to uplift or falling base level 
D)  none of these 
A)  rising seas flooded a meandering river valley 
B)  the land subsided and the river deposited sediment 
C)  a meandering river carved into the land due to uplift or falling base level 
D)  none of these

Question 13

The lowest level to which a stream can erode is its:

Accepted Answer

A)  base level 
B)  sediment capacity 
C)  bedrock 
D)  headwaters 
A)  base level 
B)  sediment capacity 
C)  bedrock 
D)  headwaters

Question 14

The amount of water flowing through a channel over a given amount of time is called its:

Accepted Answer

A)  discharge 
B)  rate of flow 
C)  velocity 
D)  drainage basin 
A)  discharge 
B)  rate of flow 
C)  velocity 
D)  drainage basin

Question 15

Which site along this stream would have the highest velocity for that segment of the stream?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
A)  A 
B)  B 
C)  C 
D)  D

Question 16

Which of the following can influence a stream's profile?

Accepted Answer

A)  a rise in sea level 
B)  a fall in sea level 
C)  tectonics 
D)  all of these 
A)  a rise in sea level 
B)  a fall in sea level 
C)  tectonics 
D)  all of these

Question 17

Relatively flat benches that are perched above a river or stream and stair-step upward and outward from the active channel are:

Accepted Answer

A)  terraces 
B)  meanders 
C)  rapids 
D)  bars 
A)  terraces 
B)  meanders 
C)  rapids 
D)  bars

What type of stream is shown in this figure?

The volume of water flowing through any part of a river per unit time is calculated by:

Which of the following is commonly associated with tributaries?

What happens to water velocity downstream? It generally:

Which of the features on this aerial photograph is a cutbank?

Which of the lettered sites would most likely be undercut by migration of a meander?

Use the following information to calculate the gradient of River X. If the vertical change is 10 meters in 1 kilometer, then the gradient expressed in m/km is:

In mountain streams that are steep with high stream velocities, which pattern of erosion is the most common?

Which of the following is unlikely to cause deposition of sediment along a stream?

Compared with curve 2 on this hydrograph, what is a possible explanation for curve 1?

Bedrock and sediment in a stream is most susceptible to erosion if it is:

How did the entrenched meanders shown in this figure form?

The lowest level to which a stream can erode is its:

The amount of water flowing through a channel over a given amount of time is called its:

Which site along this stream would have the highest velocity for that segment of the stream?

Which of the following can influence a stream's profile?

Relatively flat benches that are perched above a river or stream and stair-step upward and outward from the active channel are:

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Exam 16: Streams and Flooding

What type of stream is shown in this figure?

The volume of water flowing through any part of a river per unit time is calculated by:

Which of the following is commonly associated with tributaries?

What happens to water velocity downstream? It generally:

Which of the features on this aerial photograph is a cutbank?

Which of the lettered sites would most likely be undercut by migration of a meander?

Use the following information to calculate the gradient of River X. If the vertical change is 10 meters in 1 kilometer, then the gradient expressed in m/km is:

In mountain streams that are steep with high stream velocities, which pattern of erosion is the most common?

Which of the following is unlikely to cause deposition of sediment along a stream?

Compared with curve 2 on this hydrograph, what is a possible explanation for curve 1?

Bedrock and sediment in a stream is most susceptible to erosion if it is:

How did the entrenched meanders shown in this figure form?

The lowest level to which a stream can erode is its:

The amount of water flowing through a channel over a given amount of time is called its:

Which site along this stream would have the highest velocity for that segment of the stream?

Which of the following can influence a stream's profile?

Relatively flat benches that are perched above a river or stream and stair-step upward and outward from the active channel are:

The Nature of Geology

Investigating Geologic Questions

Plate Tectonics

Earth Materials

Igneous Environments

Volcanoes and Volcanic Hazards

Sedimentary Environments

Deformation and Metamorphism

Geologic Time

Seafloor and Continental Margins

Mountains, Basins, and Continents

Earthquakes and Earths Interior

Climate and Weathering

Glaciers, Shorelines, and Changing Sea Levels

Weathering, Soil, and Unstable Slopes

Water Resources

Energy and Mineral Resources

Geology of the Solar System

Filters