（2019新教材）外研版高中英语选择性必修二英语unit5period1 startingout&understanding ideasppt课件（含音频视频素材）.zip

Unit 5 A delicate world Starting out & Understanding ideas Easily damaged or injured Starting outStarting out Activity1: Watch the video and answer the questions. 1. Are humans part of Earths ecosystems? Why? 2. In what ways can humans affect ecosystems? _. Humans are part of Earths ecosystems. Because all the living things live in _ and people are _ Yes ecosystemsliving things Humans can affect ecosystems in _ ways. For example, to have a positive influence on ecosystems, people can _ etc. However, _ affect ecosystems in a negative way. positive and negative plant trees, feed and protect animals, recycle things, deforestation, air and water pollution and excessive waste Starting outStarting out Activity2: Look at the satellite images and answer the questions. Aral Sea is becoming smaller and smaller/ shrinking. Notes: 1. ecosystem 2. biodiversity 生物多样性 3. once in a while 偶尔 4. go extinct 5. satellite 6. delicate 脆弱的 Eg. A species will go extinct. It will disappear from the ecosystem. Understanding ideas from Chaos to Conservation Activity1: Look at the picture and answer the questions. Warm upWarm up 1. What animals can you see in the picture? 2. What kind of changes would take place if cats, rats and rabbits were introduced to an environment like this? They would hunt the birds and eat the native vegetation, thus disturbing the local ecological balance / ecosystem. Penguins and birds Go over some words: 7. chaos 大混乱；紊乱 8. conservation 保护 9. halfway 10. sculpt 11. landscape 12. dramatically drama 13. heritage 遗产 14. inhabitant 居民 inhabit 居住 habitat 栖息地 habit *15. penguin 16. exist vi. existence 存在 coexist 共存 Go over some words: 17. rat 大老鼠 & mice 复（mouse单） 18. subsequently 后来，随后 19. appetite 胃口，食欲 20. multiply 倍增；乘 21. vegetation 植物，草木（总称） 22. soil erosion 土壤侵蚀 23. explode 突然增加；爆炸 24. reserve v. 保留；预定 n. 保护区 25. virus 26. decrease & increase 27. trap n. 陷阱，圈套 v. 陷入 be caught in a trap be trapped in 28. departure depart 离开 *29. immunity 免疫力 30. collapse 倒坍；塌下 *31. substantial 大量的 32. incident 事件 33. invade - invasion 入侵 34. intervention 干预 35. pest 害虫 36. ecology 生态 37. inform 38. contrast 对比，对照 39. owe 应该做 归功于 欠 owe sb. sth. owe sth. to sb. owing to 40. entertain sb. with sth. 用sth使sb快 乐 sb. to sth. 用sth招待sb. While-readingWhile-reading Para1 Para2 Para3 Para4 Para5 Para6 A. The rabbit problem resulted in parakeets dying out. B. The rat, mouse and rabbit problem made people realise that problems should be solved once and for all. C. I participated in a programme to tackle this very problem. D. Native inhabitants on Macquarie Island were once in perfect harmony with their natural habitat. E. People released a virus to kill rabbits and used traps and dogs to catch the cats. F. Rats and mice brought to the island caused harm. Main ideas Match the information with the year when the event happened. 1.In 1810 A. Parakeets died out. 2. In 1891 B. Humans arrived on the island. 3. In the 1970s C. The last Macquarie Island cat was caught. 4. In the 1980s D. Traps and dogs were used to catch the cats. 5. In 2000 E. Macquarie Island became an official nature reserve. 6. In 2006 F. The rabbits digging caused some land to collapse, and killed a substantial number of penguins. 7. In 2014 G. Macquarie Island was declared pest-free and the island s ecology is finally on the road to recovery. 讲与练P75 IV. 语篇理解 Read the text on Page 5051 and choose the best answers. 1When did Macquarie Islands tragic story begin? AIn 1870. BWhen humans arrived on the island. CWhen humans planted many different plants there. DWhen people raised rabbits there. 2Which of the following animals wasnt brought to the island by humans? A. Parakeets. B. Cats. C. Mice. D. Rabbits. 3Which way was mentioned to remove the rabbits? AUsing traps and dogs. BRaising more cats. CReleasing a virus onto the island. DKilling them. 4According to the passage, which of the following is right? AMacquarie Island became a nature reserve in the 1980s. BThe last Macquarie Island cat disappeared in 1990. CThe virus solved the rabbit problem. DRabbits developed an immunity to the virus and their numbers exploded once again. Notes： 41. fail to do 42. in harmony with 43. take over 44. develop an appetite for 喜欢上 45. die out 46. out of control 47. come up with 48. with in mind 记住 49. in consequence 结果；因此 Notes： 50. as the saying goes, 51. or so 大约 52. It turned out that 53. participate in = take part in=join in + 活动 54. every last 所有；全部 55. by accident = by chance Notes： 56. This in turn led to more cats hunting the birds. 57. Experts felt it necessary to come up with a plan to remove all the rabbits from the island. 58. This incident made it clear that the problem needed solving once and for all. 彻底地 = need to be solved After-readingAfter-reading 1 1 Think & share