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

From Chaos to conservation MACQUARIE: (麦里夸岛) 1. chaos/'keɪɒs/ n. a state of complete confusion and lack of order 2. conservation: protection of the natural environment 1 Background infro. Para.1 A UNESCO World Heritage Site--- Macquarie lsland Location：https://whc.unesco.org/en/list/629/maps/ In the South-west Pacific Ocean, halfway between Australia &Antactic. Scenery： The green grass and bare rock of its landscape contrast dramatically giving it a wild and natual beauty. Native inhabitants king penguins , royal penguins, elephant seals 行业PPT模板http:///hangye/ Prediction Scott: What kind of changes would take place if cats, rats and rabbits were introduced to an environment like this? 2 non-native species To profit by killing wild animals, humans arrived on the island. In 1810, humans unknowingly brought rats and mice to there. Then a tragic story began happening ... Para.2 What did rats and mice do ? What changes of the population of birds? Why did human bring the cats? Group work: draw a mind of map of the relationship of animals, based on the food chain and what human have done. Para.3 Why did human bring the rabbits? What damage rabbits cause to the environment ? What changes of the population of cats and birds? What’s the end result? Group work: draw a mind of map of the relationship of animals, based on the food chain and what human have done. Para.4 What’s the human’s plan? How do experts remove the rabbits from the island? Did it work effectively? What were used to catch the cats ? Para.5 After the cats were caught, what was change to the number of rats and rabbits? How did a subtantial number of rabbits destroy the land? Para.2-para.5 Chaos Para.6 How did human recover the ecology? Step1 drop poison Step2 use dogs tp hunt these invading species Read for main idea What about the writing purpose? How Macquarie Island was saved from destruction. 4 2 What is your understanding of “… we humans owe it to the island to give it a happy ending”? Si