Question 1

A stream crossing a delta splits into a network of distributaries because:

Accepted Answer

A)  an increase in stream velocity and discharge causes the stream to cut a new stream channel away from the delta. 
B)  as waves and shoreline currents erode the delta, the stream seeks new areas in which to deposit its load. 
C)  as the delta grows, the decreased stream gradient causes greater sedimentation and clogging of the delta channels. 
D)  the stream eventually encounters erosion- resistant rocks that steer it away from the delta. 
A)  an increase in stream velocity and discharge causes the stream to cut a new stream channel away from the delta. 
B)  as waves and shoreline currents erode the delta, the stream seeks new areas in which to deposit its load. 
C)  as the delta grows, the decreased stream gradient causes greater sedimentation and clogging of the delta channels. 
D)  the stream eventually encounters erosion- resistant rocks that steer it away from the delta. C

Question 2

The Mississippi River will soon take a shorter route to the Gulf of Mexico by way of:

Accepted Answer

A)  The birdfoot delta. 
B)  Lake Pontchartrain. 
C)  The Atchafalaya River. 
D)  The Balize delta. 
A)  The birdfoot delta. 
B)  Lake Pontchartrain. 
C)  The Atchafalaya River. 
D)  The Balize delta. C

Question 3

Stream terraces indicate what overall geologic process?

Accepted Answer

A)  Local flooding in the stream valley. 
B)  A local rise in base level. 
C)  Stream deposition in its channel. 
D)  Stream erosion in its channel. 
A)  Local flooding in the stream valley. 
B)  A local rise in base level. 
C)  Stream deposition in its channel. 
D)  Stream erosion in its channel. D

Question 4

Which of the following statements concerning stream activity and water on Mars is NOT true?

Accepted Answer

A)  Most of Mars' stream- related features are near sites of ancient volcanic activity. 
B)  It is likely that most of Mars' water is trapped as ice beneath the regolith. 
C)  Mars probably has abundant surface water, as on Earth. 
D)  Because of low atmospheric pressure, any liquid water found at the surface of Mars would vaporize instantaneously. 
A)  Most of Mars' stream- related features are near sites of ancient volcanic activity. 
B)  It is likely that most of Mars' water is trapped as ice beneath the regolith. 
C)  Mars probably has abundant surface water, as on Earth. 
D)  Because of low atmospheric pressure, any liquid water found at the surface of Mars would vaporize instantaneously.

Question 5

The tectonic activity that produces trellis stream patterns would be:

Accepted Answer

A)  falling sea level. 
B)  rising sea level. 
C)  convergence. 
D)  divergence. 
A)  falling sea level. 
B)  rising sea level. 
C)  convergence. 
D)  divergence.

Question 6

In a straight section of a stream channel, the fastest water is:

Accepted Answer

A)  near the bank just below the surface. 
B)  in the middle just below the surface. 
C)  in the middle at the bottom. 
D)  near the bank at the bottom. 
A)  near the bank just below the surface. 
B)  in the middle just below the surface. 
C)  in the middle at the bottom. 
D)  near the bank at the bottom.

Question 7

A swift- flowing, relatively sediment- free stream transporting large boulders along its bed would be considered to have a:

Accepted Answer

A)  high capacity and low competence. 
B)  high capacity and high competence. 
C)  low capacity and high competence. 
D)  low capacity and low competence. 
A)  high capacity and low competence. 
B)  high capacity and high competence. 
C)  low capacity and high competence. 
D)  low capacity and low competence.

Question 8

Which of the following statements about stream drainage patterns is NOT true?

Accepted Answer

A)  A dendritic drainage pattern occurs in areas with newly exposed coastal muds and massive plutonic igneous or metamorphic rocks. 
B)  A rectangular drainage pattern occurs in areas that are nearly flat, such as the Midwestern and Great Plains states. 
C)  A trellis drainage pattern occurs in areas containing narrow valleys separated by parallel ridges. 
D)  A radial drainage pattern occurs around topographic peaks, such as young volcanic cones. 
A)  A dendritic drainage pattern occurs in areas with newly exposed coastal muds and massive plutonic igneous or metamorphic rocks. 
B)  A rectangular drainage pattern occurs in areas that are nearly flat, such as the Midwestern and Great Plains states. 
C)  A trellis drainage pattern occurs in areas containing narrow valleys separated by parallel ridges. 
D)  A radial drainage pattern occurs around topographic peaks, such as young volcanic cones.

Question 9

Streams with large amounts of coarse, bed- load sediments deposit what bedform?

Accepted Answer

A)  Mid- channel bars. 
B)  Floodplain. 
C)  Levees. 
D)  Backswamp. 
A)  Mid- channel bars. 
B)  Floodplain. 
C)  Levees. 
D)  Backswamp.

Question 10

List and describe the parts of a stream system.

Accepted Answer

Geologists classify a stream as any surf

Question 11

Which of the following statements about deltas is NOT true?

Accepted Answer

A)  The term comes from the Roman word for stream. 
B)  Topset beds are sediments deposited in horizontal layers on top of inclined foresets. 
C)  Bottomset beds are sediments deposited in horizontal layers farther away from the mouth of the stream. 
D)  Foreset beds are coarse sediments deposited first, close to the mouth of the stream. 
A)  The term comes from the Roman word for stream. 
B)  Topset beds are sediments deposited in horizontal layers on top of inclined foresets. 
C)  Bottomset beds are sediments deposited in horizontal layers farther away from the mouth of the stream. 
D)  Foreset beds are coarse sediments deposited first, close to the mouth of the stream.

Question 12

A stream's base level is:

Accepted Answer

A)  the elevation of the head of a stream. 
B)  the lowest level to which a stream can erode its channel. 
C)  the gradient of the stream where it enters the ocean. 
D)  the average elevation of the stream channel. 
A)  the elevation of the head of a stream. 
B)  the lowest level to which a stream can erode its channel. 
C)  the gradient of the stream where it enters the ocean. 
D)  the average elevation of the stream channel.

Question 13

A river provides "good news" to a city with all of the following EXCEPT:

Accepted Answer

A)  fertile soils adjacent to rivers grow crops. 
B)  floods damage property and disrupt transportation. 
C)  steady supply of water for home use. 
D)  source of clean hydroelectric power. 
A)  fertile soils adjacent to rivers grow crops. 
B)  floods damage property and disrupt transportation. 
C)  steady supply of water for home use. 
D)  source of clean hydroelectric power.

Question 14

During a flood, a stream's erosive power increases dramatically. The increase in erosive power is approximately equal to:

Accepted Answer

A)  the square of the increase in velocity. 
B)  two times the increase in discharge. 
C)  the increase in discharge. 
D)  the increase in velocity. 
A)  the square of the increase in velocity. 
B)  two times the increase in discharge. 
C)  the increase in discharge. 
D)  the increase in velocity.

Question 15

Explain why Mars, a virtually waterless planet, exhibits stream landforms.

Accepted Answer

None of Mars' stream landforms-braided c

Question 16

The most common structural flood control measure is:

Accepted Answer

A)  flood- control dams. 
B)  diversion channels. 
C)  artificial levees. 
D)  none of the above. 
A)  flood- control dams. 
B)  diversion channels. 
C)  artificial levees. 
D)  none of the above.

Question 17

Describe how superposed and antecedent streams develop.

Accepted Answer

A superposed stream is one that cuts dow

Question 18

Discuss methods used to predict major floods.

Accepted Answer

Because flood prediction is imprecise, p

Question 19

Which of the following statements about the processes of stream erosion is NOT true?

Accepted Answer

A)  Potholes in bedrock are evidence of stream erosion by dissolution. 
B)  Hydraulic lifting is erosion by water pressure. 
C)  Abrasion and hydraulic lifting are more efficient in fast, turbulent streams than in slow ones. 
D)  Each year, dissolution is responsible for the removal of an estimated 3.5 million metric tons of rock from the continents. 
A)  Potholes in bedrock are evidence of stream erosion by dissolution. 
B)  Hydraulic lifting is erosion by water pressure. 
C)  Abrasion and hydraulic lifting are more efficient in fast, turbulent streams than in slow ones. 
D)  Each year, dissolution is responsible for the removal of an estimated 3.5 million metric tons of rock from the continents.

Question 20

How do natural levees form?

Accepted Answer

Natural levees are ridges of sediment al

A stream crossing a delta splits into a network of distributaries because:

The Mississippi River will soon take a shorter route to the Gulf of Mexico by way of:

Stream terraces indicate what overall geologic process?

Which of the following statements concerning stream activity and water on Mars is NOT true?

The tectonic activity that produces trellis stream patterns would be:

In a straight section of a stream channel, the fastest water is:

A swift- flowing, relatively sediment- free stream transporting large boulders along its bed would be considered to have a:

Which of the following statements about stream drainage patterns is NOT true?

Streams with large amounts of coarse, bed- load sediments deposit what bedform?

List and describe the parts of a stream system.

Which of the following statements about deltas is NOT true?

A stream's base level is:

A river provides "good news" to a city with all of the following EXCEPT:

During a flood, a stream's erosive power increases dramatically. The increase in erosive power is approximately equal to:

Explain why Mars, a virtually waterless planet, exhibits stream landforms.

The most common structural flood control measure is:

Describe how superposed and antecedent streams develop.

Discuss methods used to predict major floods.

Which of the following statements about the processes of stream erosion is NOT true?

How do natural levees form?

A First Look at Planet Earth - Its Origins, Systems, and Tectonic Plates

Minerals

Igneous Rocks and Processes

Volcanoes and Volcanism

Weathering - the Breakdown of Rocks

Sedimentary Processes, Environments, and Rocks

Metamorphism and Metamorphic Rocks

Telling Time Geologically

Earth Structures - Folds, Faults, and Fabrics

Earthquakes

The Earths Interior - Whats Going on Down There

Plate Tectonics and the Formation of the Earths Oceans

Continental Tectonics and the Formation of the Earths Continents

Mass Movement

Groundwater

Glaciers and Ice Ages

Deserts and the Work of Winds

Shores and Coastal Processes

Human Use of the Earths Resources Appendices Glossary

Filters

Exam 15: Streams and Floods

A stream crossing a delta splits into a network of distributaries because:

The Mississippi River will soon take a shorter route to the Gulf of Mexico by way of:

Stream terraces indicate what overall geologic process?

Which of the following statements concerning stream activity and water on Mars is NOT true?

The tectonic activity that produces trellis stream patterns would be:

In a straight section of a stream channel, the fastest water is:

A swift- flowing, relatively sediment- free stream transporting large boulders along its bed would be considered to have a:

Which of the following statements about stream drainage patterns is NOT true?

Streams with large amounts of coarse, bed- load sediments deposit what bedform?

List and describe the parts of a stream system.

Which of the following statements about deltas is NOT true?

A stream's base level is:

A river provides "good news" to a city with all of the following EXCEPT:

During a flood, a stream's erosive power increases dramatically. The increase in erosive power is approximately equal to:

Explain why Mars, a virtually waterless planet, exhibits stream landforms.

The most common structural flood control measure is:

Describe how superposed and antecedent streams develop.

Discuss methods used to predict major floods.

Which of the following statements about the processes of stream erosion is NOT true?

How do natural levees form?

A First Look at Planet Earth - Its Origins, Systems, and Tectonic Plates

Minerals

Igneous Rocks and Processes

Volcanoes and Volcanism

Weathering - the Breakdown of Rocks

Sedimentary Processes, Environments, and Rocks

Metamorphism and Metamorphic Rocks

Telling Time Geologically

Earth Structures - Folds, Faults, and Fabrics

Earthquakes

The Earths Interior - Whats Going on Down There

Plate Tectonics and the Formation of the Earths Oceans

Continental Tectonics and the Formation of the Earths Continents

Mass Movement

Groundwater

Glaciers and Ice Ages

Deserts and the Work of Winds

Shores and Coastal Processes

Human Use of the Earths Resources Appendices Glossary

Filters