Question 1

A graded stream can be deepening its channel by down cutting while part of its energy is also widening its valley by ______ erosion.

Accepted Answer

A)  downward 
B)  longitudinal 
C)  lateral 
D)  distal 
E)  proximal 
A)  downward 
B)  longitudinal 
C)  lateral 
D)  distal 
E)  proximal

Question 2

The process of deepening of a valley by erosion of a streambed is called __.

Accepted Answer

A)  lateral erosion 
B)  down cutting 
C)  faulting 
D)  aggradation 
E)  subsidence 
A)  lateral erosion 
B)  down cutting 
C)  faulting 
D)  aggradation 
E)  subsidence

Question 3

A ridge or strip of ground separating one drainage basin from another is termed a ____.

Accepted Answer

A)  delta 
B)  neck 
C)  crest 
D)  plateau 
E)  divide 
A)  delta 
B)  neck 
C)  crest 
D)  plateau 
E)  divide

Question 4

Braided streams flow in a network of interconnected rivulets around numerous bars.

Accepted Answer

A) True 
 B)False

Question 5

A(n) ____ stream is one that exhibits a delicate balance between its transporting capacity and the sediment load available to it.

Accepted Answer

A)  graded 
B)  ephemeral 
C)  consequent 
D)  incised 
E)  beheaded 
A)  graded 
B)  ephemeral 
C)  consequent 
D)  incised 
E)  beheaded

Question 6

A river's velocity is faster ____.

Accepted Answer

A)  along the inside of a meander loop near the point bar 
B)  along the center line of the stream channel, exactly halfway between point bar and cut bank 
C)  along the outside of a meander loop near the cut bank 
D)  at the water's surface, in contact with the atmosphere 
E)  along the channel bed at the very deepest part of the channel 
A)  along the inside of a meander loop near the point bar 
B)  along the center line of the stream channel, exactly halfway between point bar and cut bank 
C)  along the outside of a meander loop near the cut bank 
D)  at the water's surface, in contact with the atmosphere 
E)  along the channel bed at the very deepest part of the channel

Question 7

A stream can lengthen itself by ____.

Accepted Answer

A)  headward erosion 
B)  deposition of a delta 
C)  meander-loop cut-off 
D)  stream discharge 
E)  Headward erosion and deposition of a delta are both correct, but meander-loop cut-off and stream discharge are incorrect. 
A)  headward erosion 
B)  deposition of a delta 
C)  meander-loop cut-off 
D)  stream discharge 
E)  Headward erosion and deposition of a delta are both correct, but meander-loop cut-off and stream discharge are incorrect.

Question 8

Paved areas and storm sewers decrease the rate of surface runoff of water.

Accepted Answer

A) True 
 B)False

Question 9

A cutoff meander can become an oxbow lake.

Accepted Answer

A) True 
 B)False

Question 10

Movement of cobbles and boulders by rolling, sliding, or dragging in a streambed is called ____ load.

Accepted Answer

A)  dissolution 
B)  solution 
C)  suspension 
D)  traction 
E)  saltation 
A)  dissolution 
B)  solution 
C)  suspension 
D)  traction 
E)  saltation

Question 11

A trellis stream pattern consists of parallel main streams with short tributaries meeting them at right angles.

Accepted Answer

A) True 
 B)False

Question 12

Discharge is the product of average stream width times average stream depth times ___.

Accepted Answer

A)  stream velocity 
B)  stream sinuosity 
C)  stream elevation 
D)  stream gradient 
E)  stream temperature 
A)  stream velocity 
B)  stream sinuosity 
C)  stream elevation 
D)  stream gradient 
E)  stream temperature

Question 13

________ are low ridges of flood-deposited sediment that form on both sides of a stream channel and thin away from the channel.

Accepted Answer

A)  Point bars 
B)  Natural levees 
C)  Oxbows 
D)  Cut banks 
E)  Deltas 
A)  Point bars 
B)  Natural levees 
C)  Oxbows 
D)  Cut banks 
E)  Deltas

Question 14

A ____ drainage pattern is one in which streams diverge outward likes spokes on a wheel.

Accepted Answer

A)  jointed 
B)  tilted 
C)  compass 
D)  radial 
E)  conical 
A)  jointed 
B)  tilted 
C)  compass 
D)  radial 
E)  conical

Question 15

_______ deposits are found in streams where running water has mechanically concentrated heavy sediment such as gold.

Accepted Answer

A)  Placer 
B)  Lag 
C)  Granular 
D)  Pebble 
E)  Agglomerated 
A)  Placer 
B)  Lag 
C)  Granular 
D)  Pebble 
E)  Agglomerated

Question 16

_____ are low ridges of flood deposited sediment that form on either side of a stream channel and thin away from the channel.

Accepted Answer

A)  Point bars 
B)  Natural levees 
C)  Incised meanders 
D)  Deltas 
E)  Oxbow lakes 
A)  Point bars 
B)  Natural levees 
C)  Incised meanders 
D)  Deltas 
E)  Oxbow lakes

Question 17

A "100-year flood" has a _______ percent chance of occurring in any given year.

Accepted Answer

A)  1 
B)  100 
C)  10 
D)  0.1 
E)  0.01 
A)  1 
B)  100 
C)  10 
D)  0.1 
E)  0.01

Question 18

A stream can increase its length by _____.

Accepted Answer

A)  building a delta 
B)  meandering 
C)  headward erosion 
D)  All of the answers are correct. 
A)  building a delta 
B)  meandering 
C)  headward erosion 
D)  All of the answers are correct.

Question 19

The delta of the ______ River is a wave-dominated delta that resembles the Greek letter delta and is the origin of the name.

Accepted Answer

A)  Mississippi 
B)  Nile 
C)  Amazon 
D)  Colorado 
E)  Ganges 
A)  Mississippi 
B)  Nile 
C)  Amazon 
D)  Colorado 
E)  Ganges

Question 20

Deltas may be river dominated, tide dominated or _____.

Accepted Answer

A)  tsunami dominated 
B)  wave dominated 
C)  glacier dominated 
D)  wind dominated 
E)  plate tectonic dominated 
A)  tsunami dominated 
B)  wave dominated 
C)  glacier dominated 
D)  wind dominated 
E)  plate tectonic dominated

Exam 10: Streams and Floods

A graded stream can be deepening its channel by down cutting while part of its energy is also widening its valley by ______ erosion.

The process of deepening of a valley by erosion of a streambed is called __.

A ridge or strip of ground separating one drainage basin from another is termed a ____.

Braided streams flow in a network of interconnected rivulets around numerous bars.

A(n) ____ stream is one that exhibits a delicate balance between its transporting capacity and the sediment load available to it.

A river's velocity is faster ____.

A stream can lengthen itself by ____.

Paved areas and storm sewers decrease the rate of surface runoff of water.

A cutoff meander can become an oxbow lake.

Movement of cobbles and boulders by rolling, sliding, or dragging in a streambed is called ____ load.

A trellis stream pattern consists of parallel main streams with short tributaries meeting them at right angles.

Discharge is the product of average stream width times average stream depth times ___.

________ are low ridges of flood-deposited sediment that form on both sides of a stream channel and thin away from the channel.

A ____ drainage pattern is one in which streams diverge outward likes spokes on a wheel.

_______ deposits are found in streams where running water has mechanically concentrated heavy sediment such as gold.

_____ are low ridges of flood deposited sediment that form on either side of a stream channel and thin away from the channel.

A "100-year flood" has a _______ percent chance of occurring in any given year.

A stream can increase its length by _____.

The delta of the ______ River is a wave-dominated delta that resembles the Greek letter delta and is the origin of the name.

Deltas may be river dominated, tide dominated or _____.

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