Question 1

Which of the following flows is most likely to be turbulent?

Accepted Answer

A) slow flow in a shallow channel 
B) slow flow in a deep channel 
C) fast flow in a shallow channel 
D) fast flow in a deep channel 
A) slow flow in a shallow channel 
B) slow flow in a deep channel 
C) fast flow in a shallow channel 
D) fast flow in a deep channel

Question 2

Why are sand-sized particles easier to erode than clay-sized particles?

Accepted Answer

A) because sand grains are rounder and roll more easily,whereas clay particles are flat and platy 
B) because sand grains are typically made of quartz,which saltates more easily than clay particles 
C) because clay particles are denser than sand particles,making them heavier 
D) because clay particles are attracted to tone another because of opposite charges,which hold them in place 
A) because sand grains are rounder and roll more easily,whereas clay particles are flat and platy 
B) because sand grains are typically made of quartz,which saltates more easily than clay particles 
C) because clay particles are denser than sand particles,making them heavier 
D) because clay particles are attracted to tone another because of opposite charges,which hold them in place

Question 3

The Niagara Falls are being cut back approximately

Accepted Answer

A) 10 km per year. 
B) 100 m per year. 
C) 10 m per year. 
D) 1 m per year. 
A) 10 km per year. 
B) 100 m per year. 
C) 10 m per year. 
D) 1 m per year.

Question 4

Curves and bends in a stream channel are called

Accepted Answer

A) alluvial fans. 
B) braids. 
C) deltas. 
D) meanders. 
A) alluvial fans. 
B) braids. 
C) deltas. 
D) meanders.

Question 5

The volume of water flowing past a given point in a given time is called the

Accepted Answer

A) capacity. 
B) competence. 
C) discharge. 
D) viscosity. 
A) capacity. 
B) competence. 
C) discharge. 
D) viscosity.

Question 6

Which of the following best explains why there are no large deltas on the east coast of North America?

Accepted Answer

A) because no rivers empty out along the east coast of North America 
B) because the Appalachian Mountains are too resistant to erosion 
C) because the rivers of the east coast have currents that are too weak to carry much sediment 
D) because the waves and tides in the Atlantic Ocean are too strong 
A) because no rivers empty out along the east coast of North America 
B) because the Appalachian Mountains are too resistant to erosion 
C) because the rivers of the east coast have currents that are too weak to carry much sediment 
D) because the waves and tides in the Atlantic Ocean are too strong

Question 7

Where does a stream channel begin?

Accepted Answer

A) where rainwater infiltrates into the subsurface weakening the underlying bedrock 
B) where there are active faults that create cracks in the underlying bedrock 
C) where rainwater flows over the surface so fast that it carves into the underlying units 
D) where there are pre-existing weaknesses in the bedding planes in the underlying units 
A) where rainwater infiltrates into the subsurface weakening the underlying bedrock 
B) where there are active faults that create cracks in the underlying bedrock 
C) where rainwater flows over the surface so fast that it carves into the underlying units 
D) where there are pre-existing weaknesses in the bedding planes in the underlying units

Question 8

For a given river,which of the following floods would have the largest discharge?

Accepted Answer

A) a 5-year flood 
B) a 20-year flood 
C) a 100-year flood 
D) Impossible to tell from the information provided. 
A) a 5-year flood 
B) a 20-year flood 
C) a 100-year flood 
D) Impossible to tell from the information provided.

Question 9

Which of the following flows is most likely to be turbulent?

Accepted Answer

A) slow flow in a shallow channel 
B) slow flow in a deep channel 
C) fast flow in a shallow channel 
D) fast flow in a deep channel 
A) slow flow in a shallow channel 
B) slow flow in a deep channel 
C) fast flow in a shallow channel 
D) fast flow in a deep channel

Question 10

Where do deltas form?

Accepted Answer

A) at drainage divides 
B) at mountain fronts 
C) at meander loops 
D) at river mouths 
A) at drainage divides 
B) at mountain fronts 
C) at meander loops 
D) at river mouths

Question 11

Which of the following equations for stream discharge is correct?

Accepted Answer

A) discharge = length × velocity 
B) discharge = depth × velocity 
C) discharge = width × depth × velocity 
D) discharge = volume × velocity × distance 
A) discharge = length × velocity 
B) discharge = depth × velocity 
C) discharge = width × depth × velocity 
D) discharge = volume × velocity × distance

Question 12

What is the discharge of a stream that is one meter deep,two meters wide,and has a water flow of 5 meters per second?

Accepted Answer

A) 1 m/sec 
B) 5 m/sec 
C) 5 m3/sec 
D) 10 m3/sec 
A) 1 m/sec 
B) 5 m/sec 
C) 5 m3/sec 
D) 10 m3/sec

Question 13

Which of the following would be the most fertile area for crops?

Accepted Answer

A) a stream channel 
B) a floodplain 
C) a natural levee 
D) an uplands area away from the stream 
A) a stream channel 
B) a floodplain 
C) a natural levee 
D) an uplands area away from the stream

Question 14

Which of the following particles would have the lowest settling velocity?

Accepted Answer

A) sand 
B) clay 
C) gravel 
D) cobbles 
A) sand 
B) clay 
C) gravel 
D) cobbles

Question 15

________ is the process whereby sand grains jump along the streambed during transport.

Accepted Answer

A) Superposition 
B) Hydrolysis 
C) Saltation 
D) Meandering 
A) Superposition 
B) Hydrolysis 
C) Saltation 
D) Meandering

Question 16

For most rivers,discharge __________ downstream.

Accepted Answer

A) increases 
B) remains constant 
C) decreases slightly 
D) decreases greatly 
A) increases 
B) remains constant 
C) decreases slightly 
D) decreases greatly

Question 17

What are the dimensions (units)of stream discharge?

Accepted Answer

A) cubic meters 
B) square meters per second 
C) meters per second 
D) cubic meters per second 
A) cubic meters 
B) square meters per second 
C) meters per second 
D) cubic meters per second

Question 18

Stream terraces are made up of ___________ deposits.

Accepted Answer

A) point bar sand 
B) floodplain 
C) alluvial gravel 
D) dune migration 
A) point bar sand 
B) floodplain 
C) alluvial gravel 
D) dune migration

Question 19

Assume you have perfectly spherical quartz grains in a stream with a velocity of 100 cm/sec.What is the minimum size of grain that would not move?

Accepted Answer

A) 0.02 mm 
B) 2 mm 
C) 2 cm 
D) 20 cm 
A) 0.02 mm 
B) 2 mm 
C) 2 cm 
D) 20 cm

Question 20

A river widens while maintaining constant slope and depth.How would the velocity and discharge change?

Accepted Answer

A) velocity decreases,discharge increases 
B) velocity increases,discharge decreases 
C) velocity remains constant,discharge remains constant 
D) velocity decreases,discharge remains constant 
A) velocity decreases,discharge increases 
B) velocity increases,discharge decreases 
C) velocity remains constant,discharge remains constant 
D) velocity decreases,discharge remains constant

Exam 18: Stream Transport: From Mountains to Oceans

Which of the following flows is most likely to be turbulent?

Why are sand-sized particles easier to erode than clay-sized particles?

The Niagara Falls are being cut back approximately

Curves and bends in a stream channel are called

The volume of water flowing past a given point in a given time is called the

Which of the following best explains why there are no large deltas on the east coast of North America?

Where does a stream channel begin?

For a given river,which of the following floods would have the largest discharge?

Which of the following flows is most likely to be turbulent?

Where do deltas form?

Which of the following equations for stream discharge is correct?

What is the discharge of a stream that is one meter deep,two meters wide,and has a water flow of 5 meters per second?

Which of the following would be the most fertile area for crops?

Which of the following particles would have the lowest settling velocity?

________ is the process whereby sand grains jump along the streambed during transport.

For most rivers,discharge __________ downstream.

What are the dimensions (units)of stream discharge?

Stream terraces are made up of ___________ deposits.

Assume you have perfectly spherical quartz grains in a stream with a velocity of 100 cm/sec.What is the minimum size of grain that would not move?

A river widens while maintaining constant slope and depth.How would the velocity and discharge change?

The Earth System

Plate Tectonics: The Unifying Theory

Earth Materials: Minerals and Rocks

Igneous Rocks: Solids From Melts

Sedimentation: Rocks Formed by Surface Processes

Metamorphism: Alteration of Rocks by Temperature and Pressure

Deformation: Modification of Rocks by Folding and Fracturing

Clocks in Rocks: Timing the Geologic Period

Early History of the Terrestrial Planets

History of the Continents

Geobiology: Life Interacts With Earth

Volcanoes

Earthquakes

Exploring Earths Interior

The Climate System

Weathering,erosion,and Mass Wasting: Interactions Between the Climate and Plate Tectonic Systems

The Hydrologic Cycle and Groundwater

Winds and Deserts

Coastlines and Ocean Basins

Glaciers: the Work of Ice

Landscapes: Tectonic and Climate Interaction

The Human Impact of Earths Environment

Filters