Unit 5 A delicate World Understanding ideas 课件-2024-2025学年高二英语外研版（2019）选择性必修第二册

33002 Unit 5 Understanding ideas MACQUARIE ISLAND: from Chaos to Conservation chaos: a state of complete confusion 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). Look at the picture below and answer the questions. 1 Pre-reading 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 Macquarie Island: Chaos to Conservation from 33002 ADD YOUR TITLE HERE Macquarie Island(麦夸里岛) Location Shape Landscape Title Inhabitants in the ____________Pacific Ocean between ________ _______ and _______ shape caused by _______ wind and ___________ ___________ and ________ contrast ___________ a _________ and ________ beauty ________ and _______ penguins, _________ and _________ Australia Antarctica Pacific Ocean South-west Australia Antarctica 33002 ADD YOUR TITLE HERE Macquarie Island(麦夸里岛) Location Shape Landscape Title Inhabitants in the ____________Pacific Ocean between ________ _______ and _______ shape caused by _______ wind and ___________ ___________ and ________ contrast ___________ a _________ and ________ beauty ________ and _______ penguins, _________ and _________ South-west Australia Antarctica long thin strong stormy seas 33002 ADD YOUR TITLE HERE Macquarie Island(麦夸里岛) Location Shape Landscape Title Inhabitants in the ____________Pacific Ocean between ________ _______ and _______ shape caused by _______ wind and ___________ ___________ and ________ contrast ___________ a _________ and ________ beauty ________ and _______ penguins, _________ and _________ South-west Australia Antarctica long thin strong stormy seas green grass bare rock dramatically UNESCO World Heritage Site royal king elephant seals 33002 the chaos of the island 1. What was brought to the island? 2. What happened after they reached the island? Read part 2(paras.2-3) and finish the following tasks. Tips Circle the subject and the verbs (or the nouns and verbs) in paras 2 and 3. 33002 arrived on Macquarie Island. unknowingly eating and attacking baby birds To control the rats and mice. were brought to the island. The cats developed an appetite for . were introduced to the island. multiplied rapidly dig holes soil erosion died out 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 But the island’s more recent history tells a different story. It’s a tragic story that began in 1810 when humans arrived on the island. In their ships they unknowingly brought rats and mice. These small animals quickly took over the island, eating the birds’ eggs and attacking baby birds. Cats were brought to the island to control the rats and mice. Unfortunately, the cats subsequently developed an appetite for the birds, too. 定语从句 占领 现在分词短语作结果状语 副词修饰整个句子 对……产生兴趣 Paragraph 2 Meanwhile, rabbits were introduced to the island as a source of food for humans. Loose on the island, they did what rabbits do best— they multipled rapidly and began eating the native vegetation and digging holes, which caused soil erosion. The exploding rabbit population provided plentiful food for the cats, meaning that the number of cats also increased. This in turn led to more cats hunting the birds. The end result was that parakeets, once large in number and native to the island, died out in 1891. 副词，与此同时 作为 非限制性定语从句 宾语从句 结果 “导致”， to为介词，后接名词或动词-ing形式 Paragraph 3 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 rabbit number exploded killing a substantial penguins was released rabbit population Cats turned to an official nature reserve caused were used to catch the cats no cats in a substantial 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 Even after Macquarie Island became an official nature reserve in the 1970s, the rabbis remained out of control. Experts felt it nccessary to come up with a plan to remove all the rabbits from the island. With this goal in mind, a virus was released onto the island. But although the virus caused the rabbit population to decrease from 1 30,000 to around 10,000, it also meant less food for the cats. The rats in consequence turned their attention—and their stomachs—back to the native birds, killing up to 60,000 each year. In the 1980s，traps and dogs were used to catch the cats. The last Macquarie Island cat was caught in 2000. 仍然不受控制 让步状语从句 从……下降到·…… 结果 被用来做…… Paragraph 4 But as the saying goes, “While the cat’s away, the mice will play.” With the departure of the cats from the island, the mouse and rat population started to increase. And remember those 10,000 or so rabbits? It turned out that they developed an immunity to the virus, and their numbers exploded once again. Then, in 2006, the rabbits’ digging caused some land to collapse, and killed a substantial number of penguins. This incident made it clear that the rat, mouse and rabbit problem needed solving once and for all. 正如谚语所说 山中无老虎，猴子称大王 结果，证明 大量的 形式宾语 宾语从句 sth. need doing某事需要被做 Paragraph 5 33002 Read paragraph 4~ 5 and draw a mindmap to show their connections expert rabits cats dogs & traps birds rats &mice penguins 33002 expert cats dogs & traps birds rats &mice virus penguins Paras 4& 5 Examples: rabits 33002 less food kill catch While the cat’s away, the mice will play immunity /ɪˈmjuːnəti/ 免疫力 kill expert rabits cats dogs & traps birds rats &mice virus digging the last cat was caught in 2000. penguins 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. So, I am here on Macquarie Island to participate in the programme to tackle this very problem. The first step involved poison being dropped from helicopters. The next step is to remove the last remnaining invading species, and that’s where I come in—with my dogs. They have been trained to find every last one, without harming the native animals. This intervention is a long, much-delayed ending to a sad story, but we humans owe it to the island to give it a happy ending. 参加，参与 目的状语 应该为……做…… Paragraph 6 33002 Read for structure Macquarie Island: from Chaos to Conservation Part 1 Para ____: Part 2 Paras _____: Part 3 Paras _____: the _________ of the island the_______________ of the island the ________________ of the island 1 beauty 2-3 chaos 4-6 conservation Divide it into three parts, and get the main idea of each part. The passage is developed in the order of _____. time 33002 2.What is your understanding of “… we humans owe it to the island to give it a happy ending”? Since it is we humans that are to blame for the ecological problem with the island, we must shoulder the responsibility to make efforts to recover the ecology of it. 33002 1.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. Think Share: 33002 2. 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. 33002 3.What lessons can we learn from Macaurie Island’s story? 1).awareness 2).action Better late than never！ ... Protect the natural ecosystem patiently and be careful of invading species. Be aware of the potential impact that human activities can have on ecosystems. Careful consideration should be given to issues of intervention to ecosystem. 33002 Human beauty chaos conservation harmony Summary 33002 Read for language Task 3 续写佳句 1.细读短文找出拟人的句子。 2.细读短文找出景色描写的句子。 3.细读短文找出含有谚语的句子。 1)(Para1)Strong winds and stormy seas have helped sculpt its long, thin shape. 2)(Para 2)But the island’s more recent story tells a different story. (Para1)The green grass and bare rock of its landscape contrast dramatically, giving it a wild and natural beauty. (Para5)When the cat’s away, the mice will play. 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...) Homework Homework Homework 33002 Thank you! $$