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Unformatted text preview: g .G into even the hardest rock formations and thereby reshaping the landscape as they engulf, push, drag, and finally deposit rock debris in places far from its original location. As a result, glaciers create a great variety of landforms that remain long after the surface is released from its icy covering.
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10. The word static in the passage is closest in meaning to
11. Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information.
○As a glacier moves, it leaves behind rock formations that have been engulfed, pushed, and dragged by the glacier.
○Glaciers reshape the landscape by carving into rock and transporting the resulting debris to distant locations.
○Glaciers carve the hardest rock formations with great energy and slowly reshape them into debris.
○The tremendous energy of slowly moving glaciers transports and finally deposits rock debris into large rock formations.
Parargraph5: Throughout most of Earth's history, glaciers did not exist, but at the present time about 10 percent of Earth's land surface is covered by glaciers. Presentday glaciers are found in Antarctica, in Greenland, and at high elevations on all the continents except Australia. In the recent past, from about 2.4 million to about 10,000 years ago, nearly a third of Earth's land area was periodically covered by ice thousands of meters thick. In the much more distant past, other ice ages have occurred.
12. According to paragraph 5, in what way is the present time unusual in the history of Earth?
○There are glaciers.
○More land is covered by glaciers than at anytime in the past.
○There is no ice age.
○No glaciers are found in Australia.
Paragraph1: Glaciers are slowly moving masses of ice that have accumulated on land in areas where more snowfalls during a year than melts. Snowfalls as hexagonal crystals, but once on the ground, snow is soon transformed into a compacted mass of smaller, rounded grains. ■ As the air space around them is lessened by compaction and melting, the grains become denser. ■ With further melting, refreezing, and increased weight from newer snowfall above, the snow reaches a granular recrystallized stage intermediate between flakes and ice known as firn. ■ With additional time, pressure, and refrozen meltwater from above, the small firn granules become larger, interlocked crystals of blue glacial ice. ■ When the ice is thick enough, usually over 30 meters, the weight of the snow and firn will cause the ice crystals toward the bottom to become plastic and to flow outward or downward from the area of snow accumulation.
13. Look at the four squares [ ■] that indicate where the following sentence could be added to...
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This note was uploaded on 09/17/2013 for the course LANGUAGE 13DL208 taught by Professor Wang during the Fall '13 term at East China Normal University.
- Fall '13