Chapter 5 - Multiple-Choice Questions 1) In 1980, _ was the...

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Multiple-Choice Questions 1) In 1980, __________ was the first Cascade Range volcano to erupt since Mt. Lassen, California, in 1915-16. A) Mt. Rainier B) Mt. Shasta C) Kilauea D) Mt. St. Helens Answer: D Diff: 1 2) Which type of basaltic lava flow has a fairly smooth, unfragmented, ropy surface? A) aa B) pegmatitic C) pahoehoe D) scoria Answer: C Diff: 1 3) __________ is a major dissolved volatile constituent in both magmas and volcanic gases? A) Water B) Carbon monoxide C) Hydrogen chloride D) Methane Answer: A Diff: 1 4) Volcanic bombs originate __________. A) as laser-guided, granite blocks launched from a supersonic jet B) as blocks of volcanic rock ejected from an erupting volcanic crater C) as erupted magma blobs that partly congeal before falling to the ground D) as ash particles that join together in the eruptive plume and fall as cobble-sized objects Answer: C Diff: 1 5) Which natural phenomenon occurs for many years after major explosive volcanic eruptions such as Tambora and Pinatubo? A) heavy falls of volcanic ash within 100 km of the volcano B) unusually warm weather in the tropics and subtropics C) a worldwide rise in sea level of one to three centimeters D) brilliantly colored sunrises and sunsets Answer: D Diff: 1 6) What fate befel the 'Lost City of Atlantis' mentioned in Plato's writings?
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B) It was obliterated by dust storms from North Africa in the fifth century A.D. C) It was buried by thick ash deposits from Mt. Vesuvius in 79 B.C. D) It disappeared as part of caldera collapse following a major, explosive, volcanic eruption. Answer: D Diff: 1 7) __________ magma is the most abundant type of erupted at oceanic spreading centers. A) Basaltic B) Granitic C) Andesitic D) Pegmatitic Answer: A Diff: 1 8) The 1991 Pinatubo eruption in the Philippines caused brilliantly colored sunrises and sunsets to be seen for the next few years. What caused this phenonmenon? A) The eruption added large amounts of carbon dioxide to the atmosphere. B) The eruptive cloud destroyed parts of the Earth's protective ozone layer. C) Radioactive atoms blown into the atmosphere glowed red as they decayed. D) Sulfur dioxide and other erupted gases formed aerosols in the stratosphere. Answer: D Diff: 1 9) The __________ ocean basin is rimmed by the most subduction zones. A) Atlantic B) Indian C) Pacific D) Arctic Answer: C Diff: 1 10) Which was the most powerful, explosive volcanic eruption of historic time? A) Mt. Pele, Martinique, 1902 B) Vesuvius, Italy, 79 A.D. C) Tambora, Indonesia, 1815 D) Nevado del Ruiz, Columbia, 1985 Answer: C Diff: 1 11) Which of the following is associated with deep mantle hot spots? A) Vesuvius and the other volcanoes of Italy
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This note was uploaded on 07/16/2009 for the course GEOL 100 taught by Professor Johntrib during the Spring '09 term at Maastricht.

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Chapter 5 - Multiple-Choice Questions 1) In 1980, _ was the...

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