Exam 4: Volcanism and Extrusive Rocks
Exam 1: Introducing Geology, the Essentials of Plate Tectonics, and Other Important Concepts60 Questions
Exam 2: Atoms, Elements, and Minerals60 Questions
Exam 3: Igneous Rocks, Intrusive Activity, and the Origin of Igneous Rocks60 Questions
Exam 4: Volcanism and Extrusive Rocks60 Questions
Exam 5: Weathering and Soil60 Questions
Exam 6: Sediment and Sedimentary Rocks60 Questions
Exam 7: Metamorphism, Metamorphic Rocks, and Hydrothermal Rocks60 Questions
Exam 8: Time and Geology59 Questions
Exam 9: Mass Wasting60 Questions
Exam 10: Streams and Floods60 Questions
Exam 11: Ground Water60 Questions
Exam 12: Glaciers and Glaciation59 Questions
Exam 13: Deserts and Wind Action60 Questions
Exam 14: Waves, Beaches, and Coasts60 Questions
Exam 15: Geologic Structures60 Questions
Exam 16: Earthquakes60 Questions
Exam 17: Earths Interior and Geophysical Properties60 Questions
Exam 18: The Sea Floor60 Questions
Exam 19: Plate Tectonics60 Questions
Exam 20: Mountain Belts and the Continental Crust60 Questions
Exam 21: Climate Change60 Questions
Exam 22: Resources60 Questions
Exam 23: The Earths Companions60 Questions
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_____ describes the surface of a basalt flow with a jagged, rubble surface.
(Multiple Choice)
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Volcanic rocks, and the magma from which they formed, have a silica content that ranges from 45% to 75% by volume.
(True/False)
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________ are cavities in extrusive rocks resulting from gas bubbles in the lava.
(Multiple Choice)
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The last volcano to erupt in the continental 48 states was __.
(Multiple Choice)
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Over 34,000 people died as a result of the ______ generated by the eruption of Krakatoa in 1883.
(Multiple Choice)
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_________ is a hill or mountain formed by the extrusion of lava or ejection of rock fragments from a vent.
(Multiple Choice)
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_____ refers to a rock's appearance with respect to the size, shape, and arrangement of its grains or other constituents.
(Multiple Choice)
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Several times in Earth's history, outpourings of magma covered many thousands of square kilometers in multiple flows called __.
(Multiple Choice)
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Pahoehoe lava flow is characterized by a ropy or billowy surface.
(True/False)
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A _____ is a mixture of gas and pyroclastic debris that is so dense that it hugs the ground as it flows rapidly into low areas.
(Multiple Choice)
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The Roman city of _____ was destroyed by the eruption of Vesuvius in 79 AD.
(Multiple Choice)
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Pillow structures, pillow-shaped rounded masses, form where lava is extruded under water.
(True/False)
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How do scientists indicate the power of a volcanic eruption?
(Multiple Choice)
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