Chapter 18 - Multiple-Choice Questions 1) The __________ is...

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Multiple-Choice Questions 1) The __________ is not the name of a Pleistocene glacial episode in North America. A) Dakotan B) Kansan C) Illinoian D) Nebraskan Answer: A Diff: 1 2) The __________ was the most recent Pleistocene glacial episode in North America. A) Dakotan B) Kansan C) Indianan D) Wisconsinan Answer: D Diff: 1 3) __________ is one of the two, major flow mechanism in a glacier. A) Basal slip B) Crevassal slip C) Frost heaving D) Morainal sliding Answer: A Diff: 1 4) Where is the world's largest ice sheet located today? A) Greenland B) Russia, Siberia C) Iceland D) Antarctica Answer: D Diff: 1 5) Approximately how long ago did the last of the great North American ice sheets melt? A) 1500 yrs B) 1.5 million yrs C) 15,000 yrs D) 150,000 yrs Answer: C Diff: 1 6) __________ has speeds comparable to those of a flowing alpine glacier. A) Soil creep B) Streams C) Mudflows
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D) Basaltic lava flows Answer: A Diff: 1 7) The bottom or downward tip of a crevasse marks the __________. A) boundary between parts of the glacier moving by basal sliding and crevassal slip B) boundary between the basal sliding and external flowage zones C) bottom of the basal sliding zone D) top of the internal deformation and flowage zone Answer: D Diff: 1 8) Which one of the following applies to a valley glacier that lengthens (extends its terminus downslope) over a period of many years? A) Wastage exceeds accumulation. B) Accumulation exceeds wastage. C) Accumulation and wastage are about equal. D) none of the above Answer: B Diff: 1 9) Abrasion and plucking generally involve what part of a glacier? A) the internal, flowage zone B) the snout zone C) the surface, brittle zone D) the basal, sliding zone Answer: D Diff: 1 10) A __________ cross-valley profile is typical of canyons and valleys eroded and deepened by alpine or valley glaciers. A) U B) Y C) V D) S Answer: A Diff: 1 11) __________ are erosional features produced by valley/alpine glaciers. A) Moraines B) Cirques C) Eskers D) Drumlins Answer: B Diff: 1
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12) A(n) __________ is a depositional feature composed of till and only associated with continental glaciation, not with alpine glaciers. A) cirque B) moraine C) drumlin D) outwash deposit Answer: C Diff: 1 Match the feature with the appropriate material. A) till B) outwash C) solid rock 13) _____ moraine Answer: A Diff: 1 14) _____ erratic Answer: C Diff: 1 15) _____ cirque Answer: C Diff: 1 16) _____ esker Answer: B Diff: 1 17) _____ horn Answer: C Diff: 1 18) _____ drumlin Answer: A Diff: 1 19) __________ first developed the theory that small variations in the Earth-Sun distance were responsible for short term, climatic oscillations (1000 to 100,000 years). A) H. Goering B) H. Marcee C) G. Zukhov D) M. Milankovitch Answer: D
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Diff: 1 20) The great, Southern Hemisphere glaciation that affected parts of Africa, South America, India, Australia, and Antarctica occurred __________. A) in late Paleozoic time
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