The Wrath of Vulcan

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Question 1
The presence of pillow lava is evidence of what volcanic circumstance?
Correct Answer: a submarine volcano

Question 2
A glowing cloud of hot gases and volcanic pieces:
Correct Answer: is called a pyroclastic flow or nuée ardente.

Question 3
A lahar is:
Correct Answer: a volcanic mud and debris flow that resembles fluid concrete.

Question 4
The enlarged volcanic craters at Yellowstone, Crater Lake, and Krakatau are:
Correct Answer:
formed by both explosion outward and collapse inward of the mountain.

Question 5
Volcanic mudflows, composed of ash, debris, and water:
Correct Answer:
have often resulted in damage and death to humans and their property.

Question 6
Which of the following is not a form of lava?
Correct Answer:  Lapilli

Question 7
Lava of low viscosity:
Correct Answer:  all of the above are true.

Question 8
Vesuvius erupted-a very violent explosion-in 79 A.D. and buried the residents of Pompeii in ash. On the basis of this information, which of the following would you least expect to find at Vesuvius?
Correct Answer:   Basalt

Question 9
Lava is:
Correct Answer:  molten rock that cools and hardens on Earth's surface.

Question 10
Rhyolite lava:
Correct Answer:   all of the above are true.

Question 11
Pick out the false statement. Carbon dioxide:
Correct Answer:is a toxic (poisonous) gas; even a little can kill you.

Question 12
Mt. St. Helens erupted in 1980, sending out gas and pyroclastics. Geologists have found evidence of many eruptions of St. Helens, dating back 37,000 years. The mountain is huge and is composed of layers of lava and pyroclastics. Which of the following is most likely true?
Correct Answer:
It's a stratovolcano (or composite cone).

Question 13
This stratovolcano recently erupted in the United States. Although it warned of its impending eruption, it still killed people, partly because it first blew sideways and produced a monstrous landslide. The explosion sent tons of ash skyward and blasted more than 1,000 feet off the mountaintop. The volcano is:
Correct Answer:  Mt. St. Helens.

Question 14
This Caribbean volcano warned of its impending eruption for more than a month, but early in 1902 it killed thousands with a pyroclastic flow. In the 1990s, similar eruptions on the neighboring island of Montserrat threatened thousands.
Correct Answer:   Mt. Pelée

Question 15
In the 1990s, a California camper in a volcanic area died after he ignored posted warnings and slept in a campground among standing but dead trees. He was not scalded, he was not poisoned, and the campground did not smell bad. What volcanic gas killed the camper and the trees?
Correct Answer:   carbon dioxide

Chapter 16
Which of the following does not describe the architecture (structure) of a volcano?
Correct Answer:   Vesicle

Question 17
What is the term for an unconsolidated accumulation of any size of pyroclastic grains?
Correct Answer:   Tephra

Question 18
Which of the following events is a warning sign of imminent eruption?
Correct Answer:   all of the above are warning signs.

Chapter 19
Which of the following volcanic areas is not part of the Ring of Fire?
Correct Answer:   Iceland

Question 20
Identify the false statement. The eruption of Mt. Tambora, Indonesia, in 1815:
Correct Answer:   is the only documented example of possible eruption-triggered coolness.

Question 21 
Individual volcanoes erupt fairly regularly, and if the recurrence interval is known, their eruptions can be accurately predicted.
Correct Answer: False

Question 22
Renewed eruption in a caldera can produce a resurgent dome.
Correct Answer: True

Question 23
Devil's Tower, Wyoming, and Shiprock, New Mexico, are landforms that exist because softer volcano exteriors erode faster than solidified lava in fissures and vents.
Correct Answer: True

Question 24
Lava is the greatest volcanic hazard to human life because it travels so fast.
Correct Answer: False

Question 25
Many planes have crashed because volcanic ash sucked into their engines blocked the engine's airflow and shut it down.
Correct Answer: False

Question 26
Pyroclastic flows bring instant death to any life caught in them.
Correct Answer: True
 
Question 27
A tsunami is a tidal wave caused by the proper lineup of the Moon and the Sun.
Correct Answer: False


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