Volcanic Activities completed.pdf

Volcanic Activities completed.pdf - GRADED ACTIVITIES FOR...

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GRADED ACTIVITIES FOR CHAPTER 5- VOLCANIC ACTIVITIES ATTEMPT ALL QUESTIONS TOTAL POINT 2.5 1. Mt. Vesuvius erupted in a very violent explosion in 79 C.E. 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? a. basaltic lava b. lapilli (cinders) c. rhyolite lava d. ignimbrite 2. A lahar is a. a glowing cloud of pyroclastic fragments and hot gas. b. a lava lake in a summit crater. c. a collapsed volcanic structure. d. a volcanic mud flow that resembles fluid concrete. 3. Which of the following is NOT a form of lava? a. a’a’ b. pahoehoe c. blocky d. lapilli 4. Identify the FALSE statement. Lava of low viscosity a. can flow farther than intermediate- or high-viscosity lava. b. indicates an area that has little potential for explosive eruptions. c. is most often a “cool” temperature lava. d. has low silica content. 5. Lava is a. always produced during any volcanic activity. b. molten rock that cools and hardens on Earth's surface. c. all the same chemical composition, whether it is rhyolite or basalt. d. the most life-threatening volcanic product of any eruption. 6. Identify the FALSE statement. Rhyolite lava a. has more silica than basalt lava does. b. indicates the tendency for explosive activity. c. may be squeezed upward and out of the vent to create a lava fountain. d. may form a lava dome above the vent. 7. Identify the FALSE statement. Volcanic gases a. are more abundant in felsic lavas than mafic lavas.
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