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

Lesson 1 The Sixth Extinction Unit3 Conservation Reading 1 01 Before we read 2 The Five Major Mass Extinctions 01 02 03 04 二叠纪(the Permian period) 95% die out 82% die out 76% die out 80% ddie out out 三叠纪(the Triassic period) 白垩纪(the Cretaceous period) 小行星或彗星坠落地球 05 泥盆纪(the Devonian period) 85% die out 奥陶纪（the Ordovician period) 3 2 About what percent of all species on Earth became extinct during the mass extinction known as the “Great Dying”? a. Less than 10% b. Nearly 50% c. More than 90% 3 What do scientists think will cause the next mass extinction? a. Human activity b. Natural causes c. Unknown reasons 1 How many times up to today has life on Earth almost died out? a. Once b. Five times c. More than 10 times How much do you know about extinction? 4 So will there be a six extinction? 5 02 While-reading 6 Make a match Background information Causes Consequences Solutions Para4 Para1 Para2 Para3 7 单击此处输入标题文本 Para1 Para2 Background information Causes Consequences Solutions Para3 Para4 8 Read the text and complete the notes. Definition of extinction The entire species are wiped out Number of times Over 90% of all species that ever lived Two notable extinctions The third mass extinction, killed 90% to 96% of all species; The fifth event caused the death of the dinosaurs Main reasons for extinctions 1.volcanic eruptions, 2.asteroids hitting the Earth from space, 3. changes in sea levels, the decrease of oxygen content of the sea,global warming 9 How to avoid the sixth mass extinction 1. Change the way we live, including setting up special areas where plants and animals can be protected; 2. Change how we work and travel by using cleaner, more natural sources of energy; improve our farming methods 10 03 Intensive reading 11 Read again and answer the questions. 1. What did scientists find out in 2015? 2. Why does the writer think the sixth mass extinction will come? 3. Why does the writer believe we’ll probably die out if 75% of the Earth’s species die out? 4. What did people do in the case study to protect black robins? Which claim (s) did the case study support in the text? 12 1. What did scientists find out in 2015? 2. Why does the writer think the sixth mass extinction will come? 3. Why does the writer believe we’ll probably die out if 75% of the Earth’s species die out? 4. What did people do in the case study to protect black robins? The case study showed that even in desperate situations, we can do something to help. In short, it’s never too late. Which claim (s) did the case study support in the text? 04 Summary 17 Causes D Overfishing C Factory farming B Forests being destoryed A Air and wate pollution 18 Consequneces C human beings die out B Nature balance broken A 3/4 species die out 19 Solutions C Take steps to save endangered species B Change the way we live A Improve farming methods 20 Brainstorm(Group of 4) What are other ways can we figure out to avoid exrtinction? 21 Watch a video and think about the importance of protecting the earth today! 05 Homework Name one or two phenomenon that you think is assosiated with the extinction of species and figure out possible solutions thus writing down your proposals within 100 words. 23 THANK YOU 24 Lavf60.3.100 Packed by Bilibili XCoder v2.0.2 Lavf60.3.100 Packed by Bilibili XCoder v2.0.2 $$