Unit 5 A delicate World Understanding ideas 课件-2025-2026学年高中英语外研版选择性必修第二册

该高中英语课件围绕“麦夸里岛：从混乱到保护”主题，通过标题预测、本土与非本土动物影响讨论等导入活动，搭建从预测文本主旨到细节分析再到实际应用的学习支架，帮助学生逐步理解生态变迁的逻辑脉络。 其亮点在于融合语言能力（如chaos、conservation等词汇学习，快速阅读匹配段落大意训练）、思维品质（分析人类活动与生态破坏的因果关系，梳理1970-1980年代保护措施时间线）和文化意识（引用“绿水青山就是金山银山”渗透环保理念），采用任务型教学（小组讨论避免生态问题措施、高考演讲稿写作），通过“beauty, chaos, conservation, harmony”关键词及“Small action, but big chaos!”口号总结主题。学生能提升语言运用与批判性思维，教师可借助完整教学流程与高考链接优化教学效率。

A delicate world unit 5 Understanding ideas 1 from Chaos to Conservation Macquarie Island: 2 1. Read the title and predict the main idea of the passage. Macquarie Island: from Chaos to Conservation n.a state of complete confusion and lack of order.=mess, disorder /'keɪɒs/ n.混乱；紊乱 /kɒnsə'veɪʃn/ n.（对自然环境的）保护 n. protection of the natural environment= protection 33002 Macquarie Island: Chaos to Conservation from Pre-reading 1. How much do you know about Macquarie Island? 2.What will happen if all these animals are put in the island ? ＋ I think the island will be _______. native inhabitants non-native inhabitants = crowded 拥挤的 destroyed毁掉的 damaged 受损的 chaotic 混乱的... birds penguins cats, rats and rabbits 1.Read the text fast and match main ideas with their paragraphs. Para 1 A. The conservation of the island Paras 2-3 B. The beauty of the island Para 4-6 C.The chaos of the island Whie-reading Macquarie Island Location in the __________Pacific Ocean between ________and _________. Shape _______ and _______ shape caused by _______ wind and ______________. Landscape ___________ and ________ contrast ___________ Title a ________________________________ Inhabitants a ______ and ________ penguins, _________________. South-west Australia Antarctica long thin strong stormy seas green grass bare rock dramatically UNESCO World Heritage Site royal king elephant seals 1. Find the detailed description of Macquarie island in paragraph 2.What happened to Macquarie Island before 1970s according to para. 2-3? A tragic story Humans arrived on the island. unknowingly brought brought attack eat control develop an appetite Die out Meanwhile, rabbits were introduced to the island as a source of food for humans. multiplied quickly eat the native vegetation digging holes cause soil erosion more rabbits means more cats hunting 3.Fill in the following blanks with information in para.4-5 Time In the 1970s In the 1980s measures results The remaining 10,000 rabbits ? The large number of mice and rats ? Disastrous results in 2006 Caused some land to collapse Killed a substantial number of penguins Remove all the invading species once and for all. Became an official nature reserve; A virus was released to control rabbits Traps and dogs - catch the cats. Rabbits were reduced to 10,000. The cats - native birds. The last cat was caught in 2000. Rats started to increase. 4.Read para. 6 with the following questions. What’s the author’s mission on the island? Remove the last remaining invading species. How do you understand the sentence “ we human owe it to the island to give it a happy ending.” at the end of the passage ? It is humans that have caused great damage to the island and it is our duty to help it return to normal. Poison and dogs were used. To remove all the remaining invading species. This island was pest-free and its ecology is on the road to recovery. they took over the island, eating the birds’ eggs and attacking baby birds Cats were brought to the island. The cats developed an appetite for the birds. Rabbits were introduced. To provide food for humans. more cats hunting the birds. As a result, parakeets died out. A virus was released onto the island. To remove all the rabbits. Substantial reduction of rabbit population led to cats killing more native birds. Traps and dogs were used. To catch the cats. The departure of the cats resulted in an increasing population of rats and mice. And the rabbit population exploded once again. 6. Choose the author’s purpose in writing this passage and give your reasons.(p68 Activity 3) A. To analyse how Macquarie Island was saved from destruction. B. To inform readers of the chaos caused on Macquarie Island by humans. C. To entertain reader with a funny story about what happened on Macquarie Island. D. To suggest ways in which an ecosystem can be protected. A From the passage we know that just because of a small event, human beings have paid such a huge price." Post-reading: Think and share How could similar situations be avoided in the future? Clear Waters and Lush Mountains are as Valuable as Gold and Sliver. Xi Jinping 16 To avoid similar situations in the future, we should... _______ should play a part in protecting the environment. Everyone Our country should__________________ People should ___________________ They shouldn’t__________________ As students, we should__________________ Group work As high school students, we can... plant more plants collect waste for recycling prevent pouring waste water into river, lake and field don’t pick the flowers or step on the grass in public tell people fully realize the importance of environment protection through education reduce the use of plastic bags reduce the use of electrical appliances take less private car . stop wasting protect the natural ecosystem ; prevent species invasion caused by humans 3. be aware of the potential influence on nature; 4. live in the harmony with the nature ; 5. take the road of sustainable development; 保护自然生态系统 要意识到对自然的潜在影响 与自然和谐相处 走可持续发展之路…… 防止人类造成的物种入侵 19 高考链接： 学校下周将举办一个主题为“Clear Waters and Lush Mountains Are as Valuable as Gold and Silver”的英文演讲比赛，你准备一篇演讲稿参赛，内容包括： 1.你对本次比赛主题的理解； 2.举例说明问题(1-2个）； 3.号召全校同学行动起来贡献自己的一份力量(措施2-3个）。 Good morning, everyone. It’s my great honor to give a lecture here on “Clear Waters and Lush Mountains Are as Valuable as Gold and Silver”. President Xi’s words reminds us that we should... With the development of modern industry, ....（问题） Therefore, . It’s our duty to...(措施) Summary Human beauty chaos conservation harmony Small action, but big chaos! Protect the nature, and keep ecological balance! Homework Level 1: Finish the writing“Clear Waters and Lush Mountains Are as Valuable as Gold and Silver” Level 2: Write down the useful measures that can be used to solve the environmental problems. Small action, but big chaos！ Protect the nature, and keep ecological balance！ Thank You ! Lavf59.27.100 Bilibili VXCode Swarm Transcoder v0.7.74 $