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

Multiple Choice Questions

1. At one point, Rabalais drives the author first to the Mississippi River and then to the Atchafalaya River, showing him that the Mississippi is 18 feet above sea level while the Atchafalaya is how many feet above sea level?
(a) Twenty-five.
(b) Nineteen.
(c) One.
(d) Five.

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

3. Henry Shreve changes the Mississippi River by introducing what?
(a) Gambling along the river.
(b) New fish breeds.
(c) Mississippi steamboat.
(d) Vegetation native to Mexico.

4. In the 1800s, swamps in Louisiana are drained and used as what?
(a) Farmland.
(b) Hideouts.
(c) Storage pits.
(d) Military camps.

5. When the author walks the streets of Iceland's Heimaey years after the 1973 eruption, what does he see?
(a) A completely deserted ghost town.
(b) Vacant houses that have never been repaired.
(c) Several new neighborhoods built atop cooled lava flows.
(d) A town twice as large as before the eruption.

Short Answer Questions

1. The livelihood of approximately how many people is affected by the Old River Control?

2. What gives Thorbjorn Sigurgeirsson the idea to cool the oncoming flow of lava?

3. Why do residents of Heimaey hose down oncoming lava?

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

5. How does Sigurdur Steinthorsson monitor volcanic gases during the 1973 eruption?

(see the answer key)

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