Unit 3 Conservation Lesson 1 - 高二英语上学期同步精品课堂（北师大版2019选择性必修第一册）

Lesson 1 The Sixth Extinction Unit 3 Conservation 北师大版（2019） 选择性必修一 die out species ﹡wipe wipe out unusual mass varied ﹡asteroid decrease 消失；绝迹，灭绝 n. 物种，种 vt. 擦；拭 彻底毁灭 adj. 异常的；不平常的 adj. 大量的 adj. 各种各样的，形形色色的 n. 小行星 vi.&vt. 减少 n. 减少；减少的量 blame be to blame affect be at risk endangered solar hatch restore vt. 责怪，指责 把……归咎于 vt. 影响 处境危险，受到威胁 adj. 濒危的 adj. 太阳光（能）的 vi.&vt. （使）孵化 vt. （使）恢复 Activity 1 How much do you know about extinction? Choose the option based on your knowledge. (　　) 1. How many times up to today has life on Earth almost died out? a. Once. b. Five times. c. More than 10 times. (　　) 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. Activity 2 (　　) 1. How many times up to today has life on Earth almost died out? a. Once. b. Five times. c. More than 10 times. (　　) 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. b c a Read a text about extinction. Then check your answers in Activity 1. Activity 3 Meaning of extinction How to avoid the sixth mass extinction Main reasons that cause extinctions Two notable extinctions and their consequences The number of extinctions that have occurred so far Extinction Read the text. Complete the notes. Then talk about the different aspects of extinctions. Activit