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This quiz consists of 5 multiple choice and 5 short answer questions through Cooling the Lava.

Multiple Choice Questions

1. For how many years after the Old River Control begins does the operation appear to be successful?
(a) Sixteen.
(b) Two.
(c) Ten.
(d) Twenty-one.

2. In 1973, what happens to the Old River Control structure despite engineers drilling it and filling it with cement?
(a) The structure is knocked down and rebuilt.
(b) The foundation is eroded and undermined.
(c) Funding to strengthen the structure is cut.
(d) The entire project is cancelled.

3. Both Iceland and Hawaii are the world's most what?
(a) Earthquake-prone islands.
(b) Dangerous places to live.
(c) Productive geophysical hotspots.
(d) Inhabited islands.

4. Sigurdur Jonsson is an Iceland resident who works on what?
(a) Polar bear protection.
(b) Fishing boats.
(c) Pumping crews.
(d) Tourism.

5. In the early 1800s, private plantation owners in Louisiana levee riverbanks to:
(a) Irrigate their land.
(b) Combine river water.
(c) Protect their land.
(d) Store river water.

Short Answer Questions

1. A navigation lock on the bank of the Mississippi River lowers ships down to where?

2. When the author recounts the moments before the 1973 eruption in Heimaey, he describes what?

3. With "City Flow" moving towards them in Heimaey, what do pumping crews do?

4. A towboat is designed to:

5. What happens when the north side of the volcanic mountain in Vestmannaeyjar breaks loose?

(see the answer key)

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