Unit 5 A delicate World Understanding ideas 课件-2023-2024学年高中英语外研版（2019）选择性必修第二册

Learning Objectives We will be able to ... find out what happened to Macquarie Island; make a flow chart to show humans’ actions, purposes and the results. talk about how to protect our natural ecosystem. 流程图 麦夸里岛 自然生态系统 1 Unit 5 A delicate world Understanding ideas 2. Background information: Macquarie/m 'kw ri/ Island(麦夸里岛) Guess Game:What animals are they? royal penguins 皇家企鹅 king penguin 帝企鹅 elephant seals 海象 ( seal :海豹) sea mew 海鸥 They all live in Macquarie Island. =native inhabitants 1.Guess Game:What animals are they? rabbits humankind 人类(总称) dog rat 大老鼠 cat mice (mouse的复数) non-native inhabitants 3. Question: 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 ... Let’s read deeply into the passage and find out... 4. Read the title and predict the main idea of the passage. Macquarie Island: from Chaos to Conservation /'ke s/ n.混乱;紊乱 /k ns 've n/ n. (对自然环境的)保护 n. a state of complete confusion and lack of order n. protection of the natural environment 1.The Main idea: What happened to Macquarie island? _( Native inhanbitant / Non-native species) introduced to Macquarie Island _( helped / attacked ) native birds, and led to a _( subtle / substantial) reduction of bird population and even the extinction(灭绝) of parakeets. In addition, non-native species ate and devastated the native vegetation. All of this played a part in _ _( upsetting /cheering ) the natural harmony of the island. But now the island’s ecology(生态) is on the road to _ ( destruction / recovery) with human efforts. Let’s read together! Non-native species introduced to Macquarie Island attacked native birds, and led to a substantial reduction of bird population and even the extinction(灭绝) of parakeets. In addition, non-native species ate and devastated the native vegetation. All of this played a part in upsetting the natural harmony of the island. But now the island’