Slopes and Streams
The most important agent in the modification of landscapes is
a. glaciers
b. wind
c. waves
d. streams*
Rainsplash erosion is greater
a. on flat land
b. on granite bedrock
c. on soil covered steep slopes*
d. on areas covered by vegetation
Regarding the Mississippi River system, the _____________ is the trunk stream and the _________ and
_________ are major tributaries
a. Arkansas, Platte, Columbia
b. Ohio, Mississippi, Arkansas
c. Arkansas, Potomac, Mississippi
d. Mississippi, Ohio, Missouri*
The amount of sediment passing through a portion of a trunk stream is termed the ________ of the basin
a. discharge
b. sediment outflow
c. sediment yield*
d. sedimentation
Based on the relief of the drainage basin, which would you expect to have the highest sediment yield
a. The Ganges*
b. Mississippi
c. Amazon
d. none of these
Which type of flood do most of the modification to the landscape?
a. rare large floods*
b. frequent small floods
Which process of erosion is responsible for helping to deepen the river channel and for the development of
potholes?
a. hydraulic action
b. abrasion*
c. corrosion
d. deposition
Water in a river with a large suspended load will appear
a. very clear
b. mostly clear but slightly muddy
c. very muddy*
d. none of these
The ultimate base level for a river is
a. water ponded behind a dam
b. a lake into which a river enters and empties from
c. the deepest point along the river
d. the ocean*
Aggradation near the upstream part of the longitudinal profile of the stream will result in
a. increased stream power and decreased profile steepness
b. decreased stream power and increased profile steepness
c. increased stream power and increased profile steepness*
d. decreased stream power and decreased profile steepness
Where is a stream’s load deposited?
a. in the delta
b. in the stream itself
c. on the floodplain
d. all of the above*
e. none of the above
Which is typically the least important form of stream erosion?
a. corrosion*
b. abrasion
c. hydraulic action