Unit 3 Conservation Lesson 1 The Sixth Extinction 课件-2023-2024学年高二英语北师大版（2019）选择性必修第一册

Unit 3 Conservation Lesson 1 The Sixth Extinction 导 die out/ become extinct wipe out unusual mass endangered 分手 她的心情 affect 1.How many times up to today has life on Earth almost died out? 2.About what percent of all species on Earth became extinct during the mass extinction known as the “Great Dying”? 3.What do scientists think will cause the next mass extinction? 第一段第三行 Five times. 第一段第五行 More than 90%. 第一段最后一行 Human activity. 4.According to scientists, what are the reasons for previous extinctions? 5.What did scientists find out in the 2015 study? 6.Human activity has negatively influenced only animals. (T/F) 第一段第7-8行 Volcano eruptions, asteroids hitting the Earth from space, changes in sea levels, the decrease of oxygen content of the sea, global warming 第二段第七行 They found that human activity is causing species to die out 1000 times faster than normal. F 7.In order to survive, what steps should be taken to protect the planet? ( ) A. Setting up special areas where plants and animals can be protected. B. Improving our farming methods to reduce water, air and land pollution. C. Using cleaner, more natural sources of energy to change the way we work and travel. D. All of the above. D Extinctions, where entire species are wiped out, are not unusual in our Earth’s history. 物种灭绝，即某个物种的完全消失，在地球的历史上并不罕见。 主 系 表 where引导非限制性定语从句，对extinctions进行补充说明 引出话题：灭绝 In fact, over 90 percent of all species that ever lived are now extinct. In the last 500 million years, there have been