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This quiz consists of 5 multiple choice and 5 short answer questions through Los Angeles Against the Mountains.

Multiple Choice Questions

1. What does the author watch Wade Wells and his assistant Edwin Harp do while working in the San Gabriel Mountains?
(a) Take soil samples from steep inclines.
(b) Inspect the structural integrity of a basin.
(c) Plant pine trees to stabilize the soil.
(d) Measure the volume of debris caught in a basin.

2. When workers in Vestmannaeyjar hose down lava, why do they keep moving?
(a) Because the lava flow keeps shifting.
(b) To keep their boots from burning up.
(c) To stay warm in the cold climate.
(d) To cool down other parts of the flow.

3. After being hosed down, how long does it take for red-hot lava to turn black?
(a) Four weeks.
(b) Two and a half weeks.
(c) Hours to days.
(d) A month and a half.

4. Results of the U.S. Army Air Corps' actions on an insulating vent on Mauna Loa volcano in 1935 cannot be confirmed because:
(a) The sensors melt.
(b) The volcano stops erupting.
(c) Workers can't get close enough.
(d) The Corps' loses funding.

5. How big are some of the bowl-shaped excavations that catch debris from the San Gabriel Mountains?
(a) As large as a semi truck.
(b) The size of a soccer field.
(c) The size of a football stadium.
(d) As tall as a two-story house.

Short Answer Questions

1. Two primary factors that contribute to debris flows are broken-up rock and:

2. What does "City Flow" do in Heimaey?

3. What childhood fear does Magnus Magnusson share with the author?

4. Rabalais says he remembers being taught in high school that one day, these would be built:

5. In the early days of New Orleans, residents build their homes on what?

(see the answer key)

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