Question 1

A(n)________ flood is most often associated with northward-flowing rivers in the Northern Hemisphere because the upstream stretches of the river will thaw before the downstream.

Accepted Answer

A) ice-jam 
B) regional 
C) flash flood 
D) dam-failure 
A) ice-jam 
B) regional 
C) flash flood 
D) dam-failure

Question 2

What kind of streamflow is present in this image?

Accepted Answer

A) Braided flow 
B) Laminar flow 
C) Turbulent flow 
D) Overland flow 
A) Braided flow 
B) Laminar flow 
C) Turbulent flow 
D) Overland flow

Question 3

What is the wetted perimeter of a stream?

Accepted Answer

A) That part of a streambed that contains the strongest current 
B) Where the stream is incising on the outside of a meander loop 
C) Where deposition occurs in an abandoned stream channel 
D) The amount of flow in contact with the banks and bed of the channel 
A) That part of a streambed that contains the strongest current 
B) Where the stream is incising on the outside of a meander loop 
C) Where deposition occurs in an abandoned stream channel 
D) The amount of flow in contact with the banks and bed of the channel

Question 4

A stream is transporting Particle A.The velocity of stream is decreasing, but for the moment, Particle A is still moving.However, when the water drops below 50 cm/sec, Particle A falls below its fall velocity and is deposited.Based on this information, what is the likely particle size for this object?

Accepted Answer

A) 0.01 mm 
B) 0.1 mm 
C) 5 mm 
D) 10 mm 
A) 0.01 mm 
B) 0.1 mm 
C) 5 mm 
D) 10 mm

Question 5

Which part of a stream's sediment load moves the slowest?

Accepted Answer

A) Bed load 
B) Dissolved load 
C) Suspended load 
A) Bed load 
B) Dissolved load 
C) Suspended load

Question 6

What is the term for sediment deposited by streams?

Accepted Answer

A) Fluvium 
B) Colluvium 
C) Alluvium 
D) Talus 
A) Fluvium 
B) Colluvium 
C) Alluvium 
D) Talus

Question 7

________ occurs when a rock is gradually dissolved by flowing water.

Accepted Answer

A) Abrasion 
B) Corrosion 
C) Quarrying 
D) Exfoliation 
A) Abrasion 
B) Corrosion 
C) Quarrying 
D) Exfoliation

Question 8

After the arrival of European settlers on the Lower Mississippi, residents constructed levees along the river to protect their homes and farmlands from periodic flooding as well as to keep the channel open to navigation.Now, residents have problems with land subsidence, wave erosion, land fertility, and increased severity of floods and hurricanes, particularly in the Delta area of southern Louisiana.Why would the construction of artificial levees result in these problems?

Accepted Answer

By blocking off the

Question 9

What is the longitudinal profile?

Accepted Answer

A) The cross-sectional area perpendicular to the direction of flow 
B) The cross-sectional area from the headwaters to the mouth 
C) The slope of the stream channel from headwaters to the mouth 
D) The probability of a specific stream discharge occurring in a given year 
A) The cross-sectional area perpendicular to the direction of flow 
B) The cross-sectional area from the headwaters to the mouth 
C) The slope of the stream channel from headwaters to the mouth 
D) The probability of a specific stream discharge occurring in a given year

Question 10

________ is a measure of a stream's ability to transport particles based on size rather than quantity.

Accepted Answer

A) Corrosion 
B) Capacity 
C) Competence 
D) Carbonate 
A) Corrosion 
B) Capacity 
C) Competence 
D) Carbonate

Question 11

Which of the following beds would be easiest for a stream to erode?

Accepted Answer

A) Lined with gravel and cobbles 
B) Bedrock 
C) Lined with sand and gravel 
D) Lined with silt 
A) Lined with gravel and cobbles 
B) Bedrock 
C) Lined with sand and gravel 
D) Lined with silt

Question 12

What is the ultimate base level?

Accepted Answer

A) Continental Divide 
B) A basalt flow beneath softer sedimentary rocks 
C) Sea level 
D) The bottom of a waterfall 
A) Continental Divide 
B) A basalt flow beneath softer sedimentary rocks 
C) Sea level 
D) The bottom of a waterfall

Question 13

How will the flow in this image affect erosion of the stream channel?

Accepted Answer

A) Water is moving so smoothly that the sediments are carried in the center of the water current 
B) Turbulent flow contributes to erosion because it lifts particles from the streambed 
C) Water flow is not strong enough to lift sediments, so erosion is minimal 
D) Erosion will occur near the head of the stream, but nowhere else 
A) Water is moving so smoothly that the sediments are carried in the center of the water current 
B) Turbulent flow contributes to erosion because it lifts particles from the streambed 
C) Water flow is not strong enough to lift sediments, so erosion is minimal 
D) Erosion will occur near the head of the stream, but nowhere else

Question 14

Over oceans, rates of evaporation exceed those of precipitation.In spite of this, sea level does not drop.Explain why this is the case.

Accepted Answer

The balance is achie

Question 15

What is base level?

Accepted Answer

A) The highest elevation streams can be found. 
B) The downward limit of erosion. 
C) The transition from a straight channel stream to a meandering stream. 
D) The gradient line along the longitudinal profile of the stream. 
A) The highest elevation streams can be found. 
B) The downward limit of erosion. 
C) The transition from a straight channel stream to a meandering stream. 
D) The gradient line along the longitudinal profile of the stream.

Question 16

What depositional feature is visible here?

Accepted Answer

A) Braided channel 
B) Terrace 
C) Incised meanders 
D) Delta 
A) Braided channel 
B) Terrace 
C) Incised meanders 
D) Delta

Question 17

The Upper Mississippi River and the Lower Mississippi River have very different stream morphologies due in part because of the geology of the two regions.What is the basic geology of each region (What material is the river flowing over?), how does the geology control the river, and what is the morphology of the river as a result?

Accepted Answer

The Upper Mississippi River is a bedrock

Question 18

What is a flood?

Accepted Answer

A) When dry weather results in a high discharge 
B) When discharge in a river exceeds the river's capacity 
C) When a dam is constructed and forces sedimentation 
D) When changes in gradient result in the abandonment of meander loops 
A) When dry weather results in a high discharge 
B) When discharge in a river exceeds the river's capacity 
C) When a dam is constructed and forces sedimentation 
D) When changes in gradient result in the abandonment of meander loops

Question 19

The ________ is an elevational point that divides an entire continent into large drainage basins.

Accepted Answer

A) Appalachian Mountains 
B) Continental Divide 
C) Watershed 
D) Sediment production zone 
A) Appalachian Mountains 
B) Continental Divide 
C) Watershed 
D) Sediment production zone

Question 20

Compare and contrast the water velocity and type of streamflow in a rocky mountain stream versus a silt-bottomed stream along the Gulf Coast.

Accepted Answer

The rocky mountain stream will have a hi

Exam 16: Running Water

A(n)________ flood is most often associated with northward-flowing rivers in the Northern Hemisphere because the upstream stretches of the river will thaw before the downstream.

What kind of streamflow is present in this image?

What is the wetted perimeter of a stream?

Which part of a stream's sediment load moves the slowest?

What is the term for sediment deposited by streams?

________ occurs when a rock is gradually dissolved by flowing water.

What is the longitudinal profile?

________ is a measure of a stream's ability to transport particles based on size rather than quantity.

Which of the following beds would be easiest for a stream to erode?

What is the ultimate base level?

How will the flow in this image affect erosion of the stream channel?

Over oceans, rates of evaporation exceed those of precipitation.In spite of this, sea level does not drop.Explain why this is the case.

What is base level?

What depositional feature is visible here?

What is a flood?

The ________ is an elevational point that divides an entire continent into large drainage basins.

Compare and contrast the water velocity and type of streamflow in a rocky mountain stream versus a silt-bottomed stream along the Gulf Coast.

An Introduction to Geology

Plate Tectonics: a Scientific Revolution Unfolds

Matter and Minerals

Magma, Igneous Rocks, and Intrusive Activity

Volcanoes and Volcanic Hazards

Weathering and Soil

Sedimentary Rocks

Metamorphism and Metamorphic Rocks

Geologic Time

Crustal Deformation

Earthquakes

Earths Interior

Divergent Boundaries

Convergent Boundaries

Mass Wasting

Groundwater

Glaciers and Glaciation

Deserts and Winds

Shorelines

Global Climate Change

Earths Evolution Through Geologic Time

Energy and Mineral Resources

Touring Our Solar System

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