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“麦夸里岛物种入侵”主题，通过词汇学习（如penguin、vegetation音标）和同义词积累（chaos=mess等）搭建语言支架，引导学生分析生态问题成因、梳理解决措施，从文本理解过渡到环保意识培养，形成连贯学习脉络。 其亮点在于融合语言能力与思维品质，通过Activity 3流程梳理（人类引入物种的连锁反应）和Activity 4真假判断训练分析能力，结合文化意识中的环保责任，设计“日常环保讨论”“游客通知设计”等任务型活动。总结采用同义词表和文章结构梳理，助力学生系统掌握，教师可依托结构化活动提升教学效率，学生在语言运用中增强环保意识与问题解决能力。

Unit 5 A Delicate World Understanding Ideas In this class, students are expected to: 1. find out the cause of the chaos on the island and ways to solve the problems; 2.acquire some reading comprehension skills; 3. realize the importance of environmental protection while exploring the nature. Learning objectives penguin vegetation /ˈpeŋɡwɪn/ /ˌvedʒəˈteɪʃ(ə)n/ Macquarie Island /mə'kwɔri/ What caused it? soil erosion /sɔɪl/ /ɪˈrəʊʒ(ə)n/ Species invasion. chaos = mess, disorder conservation = protection Acticity1- Match the main ideas with the related parts. Activity 2 - Detail reading 1. What is the purpose of the island's introduction of cats? A. To kill rats and mice. B. To take over the island. C. To be food for the birds. D. To bring the island colorful. √ ≈aim，goal，target to do 表目的 introduce≈bring 引入，带入 💡 Synonym Watch: Different Words, Same Meaning In reading tests, the correct option seldom copies the passage word for word. Instead, it says the same thing using different words — usually synonyms(同义词）. 👉 Train your eyes to spot synonym pairs，and accumulate them in your daily study! Activity 2 - Detail reading 2.What can be inferred from the text? A. This chaos is nothing to do with humans. B. People have to work hard together to protect the ecosystem. C. Macquarie Island is beautiful all the time. D. Dogs were introduced to catch rats. √ Tip: Constructive &Big-Picture ✔ Constructive — makes things better ✔ Big-picture — cares about people, nature, or the future Remember: The right answer is often positive, helpful, always cooperative and looks at the bigger world. ex: together,protect,future,environment,ecosystem,responsibility,spirit,teamwork... Activity 3 - Figure out how the chaos happened. Humans 1. introduced mice & rats (1810) 2. ate birds 3. brought cats 4. to control rabbits 6.introduced 7. ate native vegetation 8. dug holes 9. caused soil erosion 10. provided food for 11. hunted more 5.developed an appetite for A B C D (para2) (para2) (para3) (para3) Activity 4 - Measures humans took True or false. (para6) ( ) 1. Dropped poison from helicopters. ( ) 3. Used dogs to remove the last remaining invading species. ( ) 2. Used virus to kill cats. T T F What should humans do in the future? What should humans do in the future? Humans should: 1.avoid introducing new species 2.protect the environment when exploring nature. 3.make laws to prevent such situations. Activity 5 - Discussion What can we do to protect the environment in our daily lives? Activity 5 - Discussion What can we do to protect the environment in our daily lives? plant more trees save electricity save water low-carbon travel Humans 1. introduced mice & rats (1810) 2. ate birds 3. brought cats 4. to control rabbits 6.introduced 7. ate native vegetation 8. dug holes 9. caused soil erosion 10. provided food for 11. hunted more 5.developed an appetite for Summary-Retell the chaos Summary-article structure introduction brought introduced remove departure invading Summary- tips 1.Synonyms(同义词） accumulation: chaos=mess=disorder conservation=protection purpose=aim,goal/to do introduce= bring protect spirit ecosystem environment future together responsibility cooperate teamwork ... Design a Visitor Notice Suppose you were a member of the conservation team. And you were asked to work with your partner to design a Visitor Notice to remind the visitors not to disturb the wild. What would you write on it? Assignment Thank you for your attention! Lavf60.16.100 $