Question 1

Which of the following features is NOT present along the Colorado River?

Accepted Answer

A) delta 
B) entrenched meanders 
C) tributaries that start in high mountains 
D) evidence for large prehistoric floods 
E) all of these are present 
A) delta 
B) entrenched meanders 
C) tributaries that start in high mountains 
D) evidence for large prehistoric floods 
E) all of these are present

Question 2

Where do mountain streams get most of their load of sediment?

Accepted Answer

A) landslides,slope failures,and erosion of the mountain sides 
B) downward incision into bedrock 
C) abrasion of bedrock along the bottom of the channel 
D) alluvial fans 
A) landslides,slope failures,and erosion of the mountain sides 
B) downward incision into bedrock 
C) abrasion of bedrock along the bottom of the channel 
D) alluvial fans

Question 3

The accompanying figure shows a series of river terraces.Which two of these terraces are probably closest in age?

Accepted Answer

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

Question 4

What type of feature is shown in this figure?

Accepted Answer

A) a braided stream 
B) river terraces 
C) alluvial fans 
D) entrenched meanders 
E) none of these 
A) a braided stream 
B) river terraces 
C) alluvial fans 
D) entrenched meanders 
E) none of these

Question 5

What type of stream is shown in this photograph?

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 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

The gradient of the stream between the two ends on the accompanying figure is:

Accepted Answer

A) 1 meter per kilometer 
B) 10 meters per kilometer 
C) 100 meters per kilometer 
D) 1 to 1 
E) 6 to 1 
A) 1 meter per kilometer 
B) 10 meters per kilometer 
C) 100 meters per kilometer 
D) 1 to 1 
E) 6 to 1

Question 8

What could cause this stream to deposit sediment?

Accepted Answer

A) a rise in base level,such as a rise in sea level 
B) subsidence of the land,producing slopes that are less steep 
C) both a rise in base level or subsidence of the land 
D) none of these 
A) a rise in base level,such as a rise in sea level 
B) subsidence of the land,producing slopes that are less steep 
C) both a rise in base level or subsidence of the land 
D) none of these

Question 9

Where would be the relatively safest place to build a bridge across the stream in the accompanying figure?

Accepted Answer

A) between points 1 and 2 
B) between points 3 and 4 
C) between points 5 and 6 
D) between points 7 and 8 
A) between points 1 and 2 
B) between points 3 and 4 
C) between points 5 and 6 
D) between points 7 and 8

Question 10

Which of the following is true about the base level of a stream:

Accepted Answer

A) Base level indicates the normal (or base)flow level before flooding. 
B) The flat top of a mountain is the ultimate base level for most streams. 
C) A mountain is close to its base level if bedrock is close to the surface. 
D) Most streams have lower gradient close to their base level. 
E) Base level generally is near the steepest part of a stream's profile. 
A) Base level indicates the normal (or base)flow level before flooding. 
B) The flat top of a mountain is the ultimate base level for most streams. 
C) A mountain is close to its base level if bedrock is close to the surface. 
D) Most streams have lower gradient close to their base level. 
E) Base level generally is near the steepest part of a stream's profile.

Question 11

The accompanying figure shows a series of river terraces.Which of these terraces is the youngest?

Accepted Answer

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

Question 12

Which of the following is a condition favoring deposition of sediment?

Accepted Answer

A) an increase in water velocity 
B) a decrease in gradient of the stream 
C) an increase in turbulence of the water 
D) an increase in the salt content of the water 
E) a decrease in grain size as a clast breaks into two pieces 
A) an increase in water velocity 
B) a decrease in gradient of the stream 
C) an increase in turbulence of the water 
D) an increase in the salt content of the water 
E) a decrease in grain size as a clast breaks into two pieces

Question 13

Which of the following can have a significant effect on a river?

Accepted Answer

A) rises and drops in sea level 
B) tectonics 
C) types of bedrock in the river 
D) changes in climate 
E) all of these 
A) rises and drops in sea level 
B) tectonics 
C) types of bedrock in the river 
D) changes in climate 
E) all of these

Question 14

What is the discharge of the stream shown in the accompanying figure if the velocity is 2 meters per second?

Accepted Answer

A) 300 cubic meters per second 
B) 60 cubic meters per second 
C) 32 cubic meters per second 
D) 15 cubic meters per second 
E) none of these 
A) 300 cubic meters per second 
B) 60 cubic meters per second 
C) 32 cubic meters per second 
D) 15 cubic meters per second 
E) none of these

Question 15

What is the most important data for studying the potential for flooding along a river for several decades into the future?

Accepted Answer

A) precipitation records 
B) newspaper accounts of previous floods 
C) satellite photographs taken every ten years 
D) discharge data from stream gauges 
A) precipitation records 
B) newspaper accounts of previous floods 
C) satellite photographs taken every ten years 
D) discharge data from stream gauges

Question 16

At which site along this stream would a point bar form?

Accepted Answer

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

Question 17

Which of the following influences whether a flood occurs?

Accepted Answer

A) the height of levees 
B) the amount of discharge 
C) urbanization (replacing farms or natural land with buildings) 
D) the width of the channel 
E) all of these are influences 
A) the height of levees 
B) the amount of discharge 
C) urbanization (replacing farms or natural land with buildings) 
D) the width of the channel 
E) all of these are influences

Question 18

For the same discharge,which site is most likely to be flooded?

Accepted Answer

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

Question 19

Stream terraces represent:

Accepted Answer

A) older floodplains of a river that has incised downward 
B) cutoff meanders of a meandering stream 
C) areas where sea level has risen and waves beveled across the coast 
D) none of these 
A) older floodplains of a river that has incised downward 
B) cutoff meanders of a meandering stream 
C) areas where sea level has risen and waves beveled across the coast 
D) none of these

Question 20

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

Which of the following features is NOT present along the Colorado River?

Where do mountain streams get most of their load of sediment?

The accompanying figure shows a series of river terraces.Which two of these terraces are probably closest in age?

What type of feature is shown in this figure?

What type of stream is shown in this photograph?

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

The gradient of the stream between the two ends on the accompanying figure is:

What could cause this stream to deposit sediment?

Where would be the relatively safest place to build a bridge across the stream in the accompanying figure?

Which of the following is true about the base level of a stream:

The accompanying figure shows a series of river terraces.Which of these terraces is the youngest?

Which of the following is a condition favoring deposition of sediment?

Which of the following can have a significant effect on a river?

What is the discharge of the stream shown in the accompanying figure if the velocity is 2 meters per second?

What is the most important data for studying the potential for flooding along a river for several decades into the future?

At which site along this stream would a point bar form?

Which of the following influences whether a flood occurs?

For the same discharge,which site is most likely to be flooded?

Stream terraces represent:

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

The Nature of Geology

Investigating Geologic Questions

Plate Tectonics

Earth Materials

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Sedimentary Environments and Rocks

Deformation and Metamorphism

Geologic Time

The Seafloor and Continental Margins

Mountains, basins, and Continents

Earthquakes and Earths Interior

Climate, weather, and Their Influences on Geology

Glaciers, shorelines, and Changing Sea Levels

Weathering, soil, and Unstable Slopes

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Exam 16: Streams and Flooding

Which of the following features is NOT present along the Colorado River?

Where do mountain streams get most of their load of sediment?

The accompanying figure shows a series of river terraces.Which two of these terraces are probably closest in age?

What type of feature is shown in this figure?

What type of stream is shown in this photograph?

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

The gradient of the stream between the two ends on the accompanying figure is:

What could cause this stream to deposit sediment?

Where would be the relatively safest place to build a bridge across the stream in the accompanying figure?

Which of the following is true about the base level of a stream:

The accompanying figure shows a series of river terraces.Which of these terraces is the youngest?

Which of the following is a condition favoring deposition of sediment?

Which of the following can have a significant effect on a river?

What is the discharge of the stream shown in the accompanying figure if the velocity is 2 meters per second?

What is the most important data for studying the potential for flooding along a river for several decades into the future?

At which site along this stream would a point bar form?

Which of the following influences whether a flood occurs?

For the same discharge,which site is most likely to be flooded?

Stream terraces represent:

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

The Nature of Geology

Investigating Geologic Questions

Plate Tectonics

Earth Materials

Igneous Environments

Volcanoes and Volcanic Hazards

Sedimentary Environments and Rocks

Deformation and Metamorphism

Geologic Time

The Seafloor and Continental Margins

Mountains, basins, and Continents

Earthquakes and Earths Interior

Climate, weather, and Their Influences on Geology

Glaciers, shorelines, and Changing Sea Levels

Weathering, soil, and Unstable Slopes

Water Resources

Energy and Mineral Resources

Geology of the Solar System

Filters