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Unformatted text preview: ed by ice and frost. Glaciers may form in permanently cold areas, and these slowly moving masses of ice cut out valleys, carrying with them huge quantities of eroded rock debris. █In dry areas the wind is the principal agent of erosion. █It carries fine particles of sand, which bombard exposed rock surfaces, thereby wearing them into yet more sand. █Even living things contribute to the formation of landscapes. █Tree roots force their way into cracks in rocks and, in so doing, speed their splitting. In contrast, the roots of grasses and other small plants may help to hold loose soil fragments together, thereby helping to prevent erosion by the wind.
10. According to paragraph 6, which of the following is both a cause and result of erosion? ○Glacial activity
11. Look at the four squares [■] that indicate where the following sentence could be added to the passage.
Under different climatic conditions, another type of destructive force contributes to erosion.
Where would the sentence best fit? 12. Directions: Three of the answer choices below are used in the passage to illustrate constructive processes and two are used to illustrate destructive processes. Complete the table by matching appropriate answer choices to the processes they are used to illustrate. This question is worth 3 points.
CONSTRUCTIVE PROCESSES ●
● DESTRUCTIVE PROCESSSES ●
● Answer Choices在 ○Collision of Earth's crustal plates
○Separation of continents
○Formation of grass roots in soil
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○Weather processes 86
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1. ○4 This is a Factual Information question asking for specific information that can be found in paragraph 1. The correct answer is choice 4. Sentence 1 of the paragraph explicitly states that Earth's landscape changes relatively rapidly compared to Earth's overall age. Choice 1, on the frequency of landscape changes, is contradicted by the paragraph. Choice 2, that landscape changes occur only at special times, is also contradicted by the paragraph. Choice 3, the frequency of landscape changes, is not mentioned.
2. ○2 This is a Vocabulary question. The word being tested is relatively, and it is highlighted
in the passage. The correct answer is choice 2. The sentence in which relatively appears is comparing Earth's time scale to the human time scale, so "comparatively" is the correct answer.
3. ○2 This is an Inference question asking for an inference that can be supported by paragraph 2. The correct answer choice 2, the Himalayas arc higher than the Caledonian mountains. The paragraph states that younger mountains are general& higher than older mountains. It also states that the Himalayas are much younger than the Caledonians. Since the Himalayas are the younger range and Lounger mountain ranges are higher than older ranges, we can infer that the...
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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