Unit 5 A delicate World Understanding ideas 课件-2024-2025学年高中英语外研版选择性必修第二册

Unit 5 Understanding ideas MACQUARIE ISLAND: from Chaos to Conservation 麦夸里岛：从混乱不堪到精心保护 阅读课件 33002 To conclude the whole process about how Macquarie Island was destroyed. To learn to retell the passage by using some phrases which talk about cause and effect. To think deeply about the effect of these human activities on Macquarie Island and call on people to protect our delicate world. Learning objectives 33002 Word and expressions halfway adj. 中间的，半途的 50 dramatically adv. 显著地 50 heritage n. 遗产；传统 50 inhabitant n. 栖居的动物 50 penguin n. 企鹅 50 habitat n. 栖息地 50 rat n. 大老鼠 50 subsequently adv. 后来，随后 50 appetite n. 胃口，食欲 50 multiply v. （使）大大增加，倍增 50 vegetation n. 植物，草木（总称） 50 erosion n. 侵蚀 50 parakeet n. 长尾（小）鹦鹉 51 chaos n. 大混乱；紊乱 51 conservation n. 保护 51 virus n. 病毒 51 decrease v. （使）变小，减少 51 trap n. 夹子，陷阱 51 departure n. 离开 51 immunity n. 免疫力 51 explode v. 突然增加 51 collapse v. 倒坍；塌下 51 substantial adj. 大量的，多的 51 incident n. 事件 51 intervention n. 干预，介入 51 owe v. 应该做；对...负有...的义务 51 postscript n. 附言 51 pest n. 有害小动物；害虫 51 ecology n. 生态 51 33002 What do you think of our earth's ecosystem? Warming-up 33002 When we are talking about the ecosystem, most of us would only think about animals and plants. But the truth is our daily activities are playing a vital role in nature just like everything else. 33002 Humans are part of Earth’s ecosystems. Humans can affect ecosystems in positive and negative ways. For example, to have a positive influence on ecosystems, people can plant trees, feed and protect animals, recycle thins, etc. However, deforestation, air and water pollution and excessive waste affect ecosystems in a negative way. 33002 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? birds penguins They would hurt the birds and eat the native vegetation, thus upsetting the local ecological balance. The picture is taken in Macquarie Island(麦夸里岛). Have you ever heard of the island? How much do you know about it? Look at the picture below and answer the questions. 1 Pre-reading 33002 ◆ It lies in the South-west Pacific Ocean. ◆ Politically, it is part of Tasmania(塔斯马尼亚岛), Australia since 1900. ◆ It became a Tasmanian State Reserve(塔斯马尼亚洲自然保护区) in 1978, and a World Heritage Site in 1997. 33002 What do you think of this island? 33002 Macquarie Island: Chaos to Conservation from 33002 Possible answer: Non-native species introduced to Macquarie Island attacked native birds and led to a substantial reduction of bird population, and even the extinction 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's ecology is on the road to recovery with human efforts. Read the passage and find out what happened to Macquarie Island. 2 While-reading 33002 1. Why did the author come to Macquarie Island? 　　　　　　　　　　　　　　　　　　　　 2. How did rats and mice come to Macquarie Island? 　　　　　　　　　　　　　　　　　　　　 3. What did experts use to remove the rabbits from Macquarie Island? 　　　　　　　　　　　 To participate in a programme to tackle the problem. They were brought there along with the ships unknowingly when the humans arrived on the island. A virus. Read the passage again and answer the questions. 33002 Tips • the first sentene of each paragraph • key words of each paragraph Read for general idea 33002 Para 1: the general introduction Para 2-3: the process from harmonious balance to choas Para 4: measures to save it Para 5: the worse situation Para 6: actions to solve the problem The main idea of each paragraph 33002 What happened to Macquarie Island? After rats, mice,cats and rabbits were brought to Macquarie Island , they attacked native birds, ate native vegetation and caused soil erosion, which broke the island’s ecosystem. But now the island's ecology is on the road to recovery with humans’ efforts. 33002 location shape landscape inhabitants in the South-west Pacific ocean , halfway between Australia and Antarctic. long and thin green grass and bare rock contrast dramatically, giving it a wild and natural beauty. royal penguins, king penguins and elephant seals ? live in perfect harmony with... general information 33002 Humans arrived on Macquarie Island. unknowingly brought rats and mice eating the birds’ eggs and attacking baby birds To control the rats and mice. Cats were brought to the island. The cats developed an appetite for birds. Rabbits were introduced to the island. multiplied rapidly dig holes soil erosion Parakeets died out 33002 measures a virus was released rabbit population decreased Cats turned to native birds an official nature reserve digging caused land collapse traps and dogs were used to catch the cats no cats in 2000 mouse andrat population increase rabbit number exploded killing a substantial penguins a virus was released rabbit population decreased Cats turned to native birds an official nature reserve digging caused land collapse traps and dogs were used to catch the cats no cats in 2000 killing a substantial penguins 33002 Are the humans’ measures effective? Why? What’s the real problem? These measures fail to capture the essence of issue, only solving the current urgent problems. The real problem is that the human activities caused the chaos. 33002 What happened to Macquarie Island after 2006 ? Mission Measures The first step involves poison dropping…. The next step is to remove…… To participate in the programme to tackle this very problem. 33002 1. To analyse how Macquarie Island was saved from destruction. 2. To inform readers of the chaos caused on Macquarie Island by humans. 3. To entertain reader with a funny story about what happened on Macquarie Island. 4. To suggest ways in which an ecosystem can be protected. Choose the author's purpose in writing this passage and give your reasons. 3 33002 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 the island. To provide food for humans. Rabbits multiplied and caused soil erosion, and the exploding rabbit population provided plentiful food for the cats. This led to more cats hunting the birds. As a result, parakeets died out in 1891. A virus was released on the island. To remove all the rabbits from the island. 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. Poison and dogs were used. To remove all the remaining invading species. The island was pest-free and its ecology is on the road to recovery. Now talk about how human interference led to such severe consequences for Macquarie Island. Organise information from the passage and complete the flow chart. 4 33002 1. What is your understanding of ''…we humans owe it to the island to give it a happy ending'' in the last paragraph? Before humans arrived, all the living things on the island existed in perfect harmony with their natural habitat for thousands of years. It was the arrival of humans that destroyed the ecological balance, so we humans are responsible for restoring it and it is our duty to help it return to normal. Think & Share Post-reading 33002 2. Do you think it was right to eradicate the “pests” from Macquarie Island? Give your reasons. I think it was right to eradicate the “pests” from Macquarie Island. The island’s ecology is finally on the road to recovery. This is because the author is participating in the programme to tackle the very problem. And the postscript of the passage showed that in 2014, Macquarie Island was declared pest-free and the island’s ecology is finally on the road to recovery. Think & Share 33002 3. How could similar situations be avoided in the future? To avoid similar situations in the future, we should protect the natural ecosystem and be aware of the potential impact that human activities can have on ecosystems. Think & Share 33002 4. What language can you use to talk about cause and effect? How would you apply it to your reading and writing? Strong winds and stormy seas have helped sculpt its long, thin shape. These small animals quickly took over the island, eating the birds' eggs and attacking baby birds. Unfortunately, the cats subsequently developed an appetite for the birds, too. They multiplied rapidly and began eating the native vegetation and digging holes, which caused soil erosion. This in turn led to more cats hunting the birds. It turned out that they developed an immunity to the virus. Think & Share 33002 Work with your partners and design a poster to call for us humans to protect the natural ecosystem. be aware of the potential impact that human activities have on the ecosystem Proposal (call on people to...) Presentation 33002 Better late than never！ In 2014, Macquarie Island is pest-free and its ecology is on the road to recovery. In 2016, the permanent scientific research station was closed down . Are there similar situations in our country? Kubuqi desert recent history now ancient time 33002 Clear Waters and Lush Mountains Are as Valuable as Gold and Sliver. ---Xi Jinping 33002 唯有了解，我们才会关心； Only if we understand can we care. 唯有关心，我们才会采取行动； Only if we care will we help. 唯有行动，生命才会有希望。 Only if we help shall all be saved. 33002 Macquarie Island was a beautiful place 1._______its native inhabitants, including royal 2.________(penguin), king penguins, and elephant seals, existed 3._____ harmony with their natural habitat for thousands of years. However, in 1810, humans 4.________(arrive) on the island with rats and mice. They quickly took over the island, eating birds’ eggs and 5._________(attack) baby birds. Cats 6._____________(bring) to control the rats and mice, but they also liked eating birds. Meanwhile, rabbits were introduced to the island but the exploding rabbit population provided food for cats, meaning that the number of cats also increased 7._________(rapid). where penguins in arrived attacking were brought rapidly Summary 33002 31 This in turn led to more cats hunting birds. The end result was that parakeets, once large in number and native to the island, died 8.______in 1891. A virus 9.________(release) onto the island caused rabbit population to decrease, but the cats, without enough rabbits to eat, killed native birds for food. Although all the cats were caught in 2000，rats and mice exploded once again. Besides, the rabbits’ 10._______(dig) caused some land to collapse and killed many penguins. A programme was started to tackle this problem. This intervention is a long process, but we humans owe it to the island to give it a happy ending. out released digging 33002 32 Prepare a short speech with the title“What we humans should do to protect our natural ecosystem?” Homework 33002 null 63110.543 Lavf58.12.100 学科网 rbm.xkw.com rbm.xkw.com 321264.0 $$