GEOG 1113L Lab 7: River Systems Quiz Questions and Answers 100%
PASS
1. What is the geographical area that contributes water to a specific stream
system called?
A. A drainage basin
B. A water table
C. A floodplain
D. A delta
Answer: A
Rationale: A drainage basin (or watershed) is the entire land area that drains water into a
particular river or stream system.
2. Which drainage pattern resembles the branching of a tree and typically forms
on uniform surface materials?
A. Radial
B. Trellis
C. Rectangular
D. Dendritic
Answer: D
Rationale: Dendritic patterns are the most common and form where the underlying rock
or sediment is uniform in its resistance to erosion.
,3. What is the formula for calculating stream discharge (Q)?
A. Q = Width x Depth
B. Q = Slope / Length
C. Q = Area x Velocity
D. Q = Velocity / Area
Answer: C
Rationale: Discharge (Q) is calculated by multiplying the cross-sectional area (A) of the
stream by the flow velocity (V).
4. In a meandering stream, where does the highest velocity of water flow occur?
A. Along the inside of the curve
B. At the bottom of the point bar
C. Uniformly across the entire channel
D. Along the outside of the curve
Answer: D
Rationale: The highest velocity occurs on the outside of a meander bend, which leads to
erosion and the formation of a cut bank.
5. What landform is created when a stream deposits sediment as it enters a
standing body of water like an ocean?
A. Alluvial fan
B. Natural levee
C. Delta
D. Oxbow lake
Answer: C
Rationale: Deltas form at the mouth of a river where the velocity drops as it enters a lake
or ocean, causing sediment deposition.
, 6. A stream that flows only during and immediately after a rain event is known
as:
A. Perennial
B. Intermittent
C. Ephemeral
D. Exotic
Answer: C
Rationale: Ephemeral streams are dry most of the time and only flow in response to
precipitation events.
7. What is the sinuosity of a stream if the channel length is 10 km and the
straight-line valley length is 5 km?
A. 0.5
B. 15.0
C. 2.0
D. 50.0
Answer: C
Rationale: Sinuosity is calculated as channel length divided by straight-line distance (10 /
5 = 2.0).
8. Which type of sediment transport involves ions dissolved in the water?
A. Dissolved load
B. Suspended load
C. Bed load
D. Saltation
Answer: A
Rationale: Dissolved load consists of minerals and salts that are carried in solution within
the water.
PASS
1. What is the geographical area that contributes water to a specific stream
system called?
A. A drainage basin
B. A water table
C. A floodplain
D. A delta
Answer: A
Rationale: A drainage basin (or watershed) is the entire land area that drains water into a
particular river or stream system.
2. Which drainage pattern resembles the branching of a tree and typically forms
on uniform surface materials?
A. Radial
B. Trellis
C. Rectangular
D. Dendritic
Answer: D
Rationale: Dendritic patterns are the most common and form where the underlying rock
or sediment is uniform in its resistance to erosion.
,3. What is the formula for calculating stream discharge (Q)?
A. Q = Width x Depth
B. Q = Slope / Length
C. Q = Area x Velocity
D. Q = Velocity / Area
Answer: C
Rationale: Discharge (Q) is calculated by multiplying the cross-sectional area (A) of the
stream by the flow velocity (V).
4. In a meandering stream, where does the highest velocity of water flow occur?
A. Along the inside of the curve
B. At the bottom of the point bar
C. Uniformly across the entire channel
D. Along the outside of the curve
Answer: D
Rationale: The highest velocity occurs on the outside of a meander bend, which leads to
erosion and the formation of a cut bank.
5. What landform is created when a stream deposits sediment as it enters a
standing body of water like an ocean?
A. Alluvial fan
B. Natural levee
C. Delta
D. Oxbow lake
Answer: C
Rationale: Deltas form at the mouth of a river where the velocity drops as it enters a lake
or ocean, causing sediment deposition.
, 6. A stream that flows only during and immediately after a rain event is known
as:
A. Perennial
B. Intermittent
C. Ephemeral
D. Exotic
Answer: C
Rationale: Ephemeral streams are dry most of the time and only flow in response to
precipitation events.
7. What is the sinuosity of a stream if the channel length is 10 km and the
straight-line valley length is 5 km?
A. 0.5
B. 15.0
C. 2.0
D. 50.0
Answer: C
Rationale: Sinuosity is calculated as channel length divided by straight-line distance (10 /
5 = 2.0).
8. Which type of sediment transport involves ions dissolved in the water?
A. Dissolved load
B. Suspended load
C. Bed load
D. Saltation
Answer: A
Rationale: Dissolved load consists of minerals and salts that are carried in solution within
the water.
