Unit 27 - Practice Book page 129-131

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Practice Name Fluency As I read, I will pay attention to my pronunciation of vocabulary words and other difficult words. The Hoover Dam brought the Colorado River under 8 control. The dam also created a reserve of water. The water 19 was used to irrigate dry farmland. It was also used as a 31 water supply by nearby cities and towns. 38 But the biggest benefit of Hoover Dam is its 47 hydroelectric power. The Hoover Dam makes a huge 55 amount of electricity. Every year it brings power to 64 1.3 million people in California, Nevada, and Arizona. 71 As an energy source, the Hoover Dam is clean and 81 cheap to run. It does not pollute the air the way fossil fuels 94 would. However, this huge dam has had some bad effects 104 on the environment. The landscape of the area will never 114 be the same. The river can no longer carry rich soil to the 127 lands it flooded. Fish and other wildlife have lost their homes. 138 But the Hoover Dam is here to stay. It is a modern 150 wonder of the United States. 155 Comprehension Check 1. How does the author persuade the reader that the Hoover Dam is helpful? Persuasion 2. Compare the effects of fossil fuels with the effects of the dam. Compare © Macmillan /McGraw-Hill and Contrast Number of Words Words Read – = Errors Correct Score First Read – = Second Read – = At Home: Help the student read the passage, paying The Power of Oil attention to the goal at the top of the page. Grade 4/Unit 4 129

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