Geology 110
Exam 2 Sample questions
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1. Which type of tectonic boundary formed the volcano below:
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a.
divergent plate boundary b. subduction zone c. hot spot d. continental collision e. transform boundary |
2.
Which type of volcanic landform is shown below:
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a.cinder
cone volcano b. stratocone volcano c. shield volcano d. volcanic dome e. caldera |
3.
True or False: Magma with a high viscosity tends to be less explosive
than magma with a low viscosity.
4. Which of the following volcanoes is least likely to erupt violently and explosively?
a. Kilauea on Hawaii
b. Mount St. Helens in the Cascades
c. Mount Augustine in the Aleutians
d. Mt. Pinatubo in the Philippines
e. Long Valley Caldera, California
5.
When a volcano known for eruption of pyroclastic flows shows signs of activity,
a.
it is safe to wait for the first abundant lava flows before evacuating.
b. precautionary evacuation may be necessary because the exact moment at
which pyroclastic flow may emerge cannot be predicted.
c. evacuation can be timed efficiently with the use of appropriate
precursors.
d. there is no need for concern; the little ash in pyroclastic flows is
no threat.
6.
Which is the least threatening hazard, in terms of loss of life and property
damage, from a stratocone or composite volcano:
a.
pyroclastic flows
b. volcanic mudflows
c. lava flows
d. ash fall
7.
Artificially straightening stream channels has which of the following effects:
1. stream discharge is decreased
2. sediment is unsorted, unlike in a meandering stream, and stream ecosystems are affected
3. water is more rapidly transported downstream
a.
1 and 2
b. 1 and 3
c. 2 and 3
d. all 3 are common effects of artificially straightening stream channels
e. none of the 3 is a common effect of artificially straightening stream
channels
8.
Which of the following typically decreases stream capacity:
a.
velocity of stream increases
b. gradient of stream increases
c. channel suddenly widens, such as with alluvial fans
d. all of the above decrease stream capacity
e. none of the above decreases stream capacity
9.
The steepness or slope of a stream channel in the direction of flow is the:
a.
capacity.
b. discharge.
c. base level.
d. gradient.
10.
A dam breaks, and stream stage is being monitored just below the dam and
several kilometers downstream. Which of the following is true?
a.
The upstream hydrograph will show a lower, broader peak.
b. The flood will produce identically shaped peaks on the hydrographs at
both places.
c. The downstream hydrograph will show a lower, broader peak.
d. Overall stream discharge will be unaffected; hydrographs will show no
changes.