geology exam 2 - GEOL 105-010,011 Spring 2007 version A...

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Sheet1 Page 1 GEOL 105 -010,011 Spring 2007 version A GEOL 105 Spring 2007 Exam II Version A Do Not Begin Until You Are told to Do So D GEOL 105 -010,011 Spring 2007 version A 1) The eruption of Mt. St. Helens took place in: a. The Aleutian subduction zone b. Canadian subduction zone c. the San Andreas subduction zone d. Cascadia subduction zone e. none of the above 2) Plinian volcanic eruptions occur when: a. the magma is high in silica b. atmospheric pressure is low c. the magma has low silica d. the magma has little gas e. none of the above occur a. along transform boundaries b. on mid-ocean ridge spreading centers. c. in the middle of plates d. in subduction zones e. in continental rifts 4) The most destructive eruptions are named: a. Plutonian b. Strombolian c. Explosian d. Pompeiian e. Plinian a. hot gas and ash b. hot mud and rock c. snow and ice d. rough, sharp basalt e. gassy basalts 6) Hawaiian type eruptions have a VEI of: a. 10 b. IX 3) Most of Earthhs volcanic activity occurs: 5) Pahoehoe lavas are flows of smooth ropy basalt, while aha lava flows are:
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Sheet1 Page 2 c. 5 d. 9.5 e. 0 e GEOL 105 -010,011 Spring 2007 version A 7) Which features would not be monitored at a potentially active volcano? a. deformations b. gas emissions c. seismic activity d. earth tides e. all the above 8) Volcanic hazard mitigation includes: a. draining the magma b. releasing gas pressure c. identifying hazard zones d. sealing the vent e. none of the above 9) An example of a caldera is: a. Vesuvius, Italy b. Mt. St. Helens, WA c. Crater Lake, OR d. Soufrierre Hills, Montserrat e. Mt. Everest, Nepal 10) Magma is formed when: a. Coal seams ignite the rock
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This note was uploaded on 04/24/2008 for the course GEOL 105 taught by Professor Kohut during the Spring '08 term at University of Delaware.

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geology exam 2 - GEOL 105-010,011 Spring 2007 version A...

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