Question 1

An interruption in a stream's graded profile of equilibrium is called a

Accepted Answer

A) gradation. 
B) longitudinal interruption. 
C) base level. 
D) nickpoint. 
E) riffle 
A) gradation. 
B) longitudinal interruption. 
C) base level. 
D) nickpoint. 
E) riffle

Question 2

The lengths of the individual channels in a dendritic drainage pattern are ________ and this increases energy ________.

Accepted Answer

A) minimized efficiency 
B) minimized inefficiency 
C) maximized efficiency 
D) maximized inefficiency 
A) minimized efficiency 
B) minimized inefficiency 
C) maximized efficiency 
D) maximized inefficiency

Question 3

Floodplains

Accepted Answer

A) are erosional features located within a depositional feature. 
B) are associated with surface erosion. 
C) are generally filled with layers of alluvium. 
D) are covered by a surface layer of coarse material including cobbles and gravel. 
E) prevent aggradation of the river. 
A) are erosional features located within a depositional feature. 
B) are associated with surface erosion. 
C) are generally filled with layers of alluvium. 
D) are covered by a surface layer of coarse material including cobbles and gravel. 
E) prevent aggradation of the river.

Question 4

Knowledge of the locations of drainage divides has no practical significance.

Accepted Answer

A) True 
 B)False

Question 5

The Nile delta is shrinking because

Accepted Answer

A) manmade distributaries have been added for farming purposes. 
B) sediment loads are carried far out into the ocean. 
C) ocean currents have increased along the coastline. 
D) the Mediterranean Basin is subsiding,thereby steepening the coastal margin. 
E) the river is downcutting. 
A) manmade distributaries have been added for farming purposes. 
B) sediment loads are carried far out into the ocean. 
C) ocean currents have increased along the coastline. 
D) the Mediterranean Basin is subsiding,thereby steepening the coastal margin. 
E) the river is downcutting.

Question 6

Stream capture refers to

Accepted Answer

A) the legal process by which a government secures rights to the waters of a river basin. 
B) the merging of two streams flowing in the same valley. 
C) the process by which one channel erodes through a drainage divide and captures the headwater regions of another stream. 
D) the illegal withdrawal of water from a river. 
E) the ponding of water in a river basin after dam construction. 
A) the legal process by which a government secures rights to the waters of a river basin. 
B) the merging of two streams flowing in the same valley. 
C) the process by which one channel erodes through a drainage divide and captures the headwater regions of another stream. 
D) the illegal withdrawal of water from a river. 
E) the ponding of water in a river basin after dam construction.

Question 7

The area north of Ottawa on the Canadian Shield in Quebec is characterized by which drainage pattern?

Accepted Answer

A) deranged 
B) trellis 
C) parallel 
D) rectangular 
E) dendritic 
A) deranged 
B) trellis 
C) parallel 
D) rectangular 
E) dendritic

Question 8

When overland flow becomes concentrated on an interfluve,it creates small grooves called ________,which can enlarge to form ________ if erosion of the slope is not controlled.

Accepted Answer

A) striations potholes 
B) potholes striations 
C) rills gullies 
D) gullies rills 
E) striations gullies 
A) striations potholes 
B) potholes striations 
C) rills gullies 
D) gullies rills 
E) striations gullies

Question 9

Braided streams are characterized by

Accepted Answer

A) sediment deposition in the channel resulting in the formation of sand and gravel bars and numerous small "channels." 
B) a small load in relation to its discharge. 
C) severe erosion of the channel bed. 
D) ice blocks and very cold water. 
E) an abundance of vegetation. 
A) sediment deposition in the channel resulting in the formation of sand and gravel bars and numerous small "channels." 
B) a small load in relation to its discharge. 
C) severe erosion of the channel bed. 
D) ice blocks and very cold water. 
E) an abundance of vegetation.

Question 10

If you followed a river from its headwaters downstream to the ocean,you would observe the water clarity decrease because

Accepted Answer

A) the saltation load would increase. 
B) the amount of clay due to weathering increases as does the load and influx of sediment into the river. 
C) there is little bed load transport in the mountains. 
D) suspended and solution load are greatest in the mountains and decrease as the river enters less steep territory. 
E) all material settles out of the flow toward the river mouth and biotic activity increases,increasing the water clarity. 
A) the saltation load would increase. 
B) the amount of clay due to weathering increases as does the load and influx of sediment into the river. 
C) there is little bed load transport in the mountains. 
D) suspended and solution load are greatest in the mountains and decrease as the river enters less steep territory. 
E) all material settles out of the flow toward the river mouth and biotic activity increases,increasing the water clarity.

Question 11

Because rivers constitute such a small percentage of Earth's total water supply,they play a small role in landform change.

Accepted Answer

A) True 
 B)False

Question 12

Deforestation in the headwater regions of a river can cause the river to flood more frequently in downstream areas.

Accepted Answer

A) True 
 B)False

Question 13

When a river reaches a base level,its forward velocity rapidly decelerates as it enters a larger body of standing water and ________ is formed.

Accepted Answer

A) an estuary 
B) an alluvial terrace 
C) a delta 
D) a stream terrace 
E) a levee 
A) an estuary 
B) an alluvial terrace 
C) a delta 
D) a stream terrace 
E) a levee

Question 14

Which of the following channel characteristics adjusts in response to changes in energy of flow and sediment load in the channel?

Accepted Answer

A) slope,width and depth 
B) length,slope and density 
C) density,width and sinuosity 
D) sinuosity,depth and length 
E) density,sinuosity and length 
A) slope,width and depth 
B) length,slope and density 
C) density,width and sinuosity 
D) sinuosity,depth and length 
E) density,sinuosity and length

Question 15

Aggradation of a stream channel produces scouring and alluvial terraces.

Accepted Answer

A) True 
 B)False

Question 16

Describe the formation and typical characteristics of a floodplain.

Accepted Answer

The answer of Describe the formation and typical characteristics of...

Question 17

Rivers make excellent political boundaries given that they are obvious,clearly defined landform features.

Accepted Answer

A) True 
 B)False

Question 18

Entrenchment of a channel occurs because

Accepted Answer

A) a decrease in stream gradient occurs. 
B) a change in the bed load size-distribution occurs. 
C) the river flows from consolidated rock into a region composed of loose sediments. 
D) rejuvenation occurs due to uplift. 
E) isostatic downwarping of the crust occurs. 
A) a decrease in stream gradient occurs. 
B) a change in the bed load size-distribution occurs. 
C) the river flows from consolidated rock into a region composed of loose sediments. 
D) rejuvenation occurs due to uplift. 
E) isostatic downwarping of the crust occurs.

Question 19

The entrenchment of a river into its own floodplain produces

Accepted Answer

A) backswamps. 
B) alluvial terraces. 
C) natural levees. 
D) river deltas. 
E) hoodoos 
A) backswamps. 
B) alluvial terraces. 
C) natural levees. 
D) river deltas. 
E) hoodoos

Question 20

Which of the following tends to occur when an area experiences tectonic uplift in its headwater region?

Accepted Answer

A) the stream will begin to deposit more of its load. 
B) the amount of turbulence will decrease. 
C) the channel will begin to erode downward at a faster rate. 
D) the channel will begin to aggrade. 
E) a braided stream will develop. 
A) the stream will begin to deposit more of its load. 
B) the amount of turbulence will decrease. 
C) the channel will begin to erode downward at a faster rate. 
D) the channel will begin to aggrade. 
E) a braided stream will develop.

Exam 14: River Systems and Landforms

An interruption in a stream's graded profile of equilibrium is called a

The lengths of the individual channels in a dendritic drainage pattern are ________ and this increases energy ________.

Floodplains

Knowledge of the locations of drainage divides has no practical significance.

The Nile delta is shrinking because

Stream capture refers to

The area north of Ottawa on the Canadian Shield in Quebec is characterized by which drainage pattern?

When overland flow becomes concentrated on an interfluve,it creates small grooves called ________,which can enlarge to form ________ if erosion of the slope is not controlled.

Braided streams are characterized by

If you followed a river from its headwaters downstream to the ocean,you would observe the water clarity decrease because

Because rivers constitute such a small percentage of Earth's total water supply,they play a small role in landform change.

Deforestation in the headwater regions of a river can cause the river to flood more frequently in downstream areas.

When a river reaches a base level,its forward velocity rapidly decelerates as it enters a larger body of standing water and ________ is formed.

Which of the following channel characteristics adjusts in response to changes in energy of flow and sediment load in the channel?

Aggradation of a stream channel produces scouring and alluvial terraces.

Describe the formation and typical characteristics of a floodplain.

Rivers make excellent political boundaries given that they are obvious,clearly defined landform features.

Entrenchment of a channel occurs because

The entrenchment of a river into its own floodplain produces

Which of the following tends to occur when an area experiences tectonic uplift in its headwater region?

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Earth's Modern Atmosphere

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Global Temperatures

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Filters

The lengths of the individual channels in a dendritic drainage pattern are and this increases energy .

When overland flow becomes concentrated on an interfluve,it creates small grooves called ,which can enlarge to form if erosion of the slope is not controlled.