Reading 05 - 02

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5 10 15 20	There are two basic types of glaciers, those that flow outward in all directions with  little regard for any underlying terrain and those that are confined by terrain to a  particular path.      The first category of glaciers includes those massive blankets that cover whole continents, appropriately called ice sheets. There must be over 50,000 square kilometers  of land covered with ice for the glacier to qualify as an ice sheet. When portions of an  ice sheet spread out over the ocean, they form ice shelves.      About 20,000 years ago the Cordilleran Ice Sheet covered nearly all the mountains  in southern Alaska, western Canada, and the western United States. It was about 3 kilometers deep at its thickest point in northern Alberta. Now there are only two  sheets left on Earth, those covering Greenland and Antarctica.      Any domelike body of ice that also flows out in all directions but covers less than  50,000 square kilometers is called an ice cap. Although ice caps are rare nowadays,  there are a number in northeastern Canada, on Baffin Island, and on the Queen Elizabeth Islands.      The second category of glaciers includes those of a variety of shapes and sizes  generally called mountain or alpine glaciers. Mountain glaciers are typically identified  by the landform that controls their flow. One form of mountain glacier that resembles  an ice cap in that it flows outward in several directions is called an ice field. The difference between an ice field and an ice cap is subtle. Essentially, the flow of an ice  field is somewhat controlled by surrounding terrain and thus does not have the domelike  shape of a cap. There are several ice fields in the Wrangell, St. Elias, and Chugach  mountains of Alaska and northern British Columbia.      Less spectacular than large ice fields are the most common types of mountain glaciers : the cirque and valley glaciers. Cirque glaciers are found in depressions in the  surface of the land and have a characteristic circular shape. The ice of valley glaciers,  bound by terrain, flows down valleys, curves around their corners, and falls over cliffs.
9. What does the passage mainly discuss? (A) Where major glaciers are located (B) How glaciers shape the land (C) How glaciers are formed (D) The different kinds of glaciers 10. It can be inferred that ice sheets are so named for which of the  following reasons? (A) They are confined to mountain valleys. (B) They cover large areas of land. (C) They are thicker in some areas than in others. (D) They have a characteristic circular shape. 11. According to the passage, where was the Cordilleran Ice Sheet thickest ? (A) Alaska (B) Greenland (C) Alberta (D) Antarctica 12. The word "rare" in line 13 is closest in meaning to (A) small (B) unusual (C) valuable (D) widespread 13. According to the passage (paragraph 5), ice fields resemble ice caps in  which of the following ways? (A) Their shape (B) Their flow (C) Their texture (D) Their location 14. All of the following are alpine glaciers EXCEPT (A) cirque glaciers (B) ice caps (C) valley glaciers (D) ice fields 15. The word "depressions" in line 25 is closest in meaning to (A) intrusion (B) dejection (C) concaves (D) convexes
9. D 10. B 11. C 12. B 13. B 14. B 15. C