高中英语 选必B5U5-第二课时-understanding ideas 课件

1、高一英语深圳市教育科学研究院2021年深圳市春季深圳市线上课程教学材料：外研版高中英语新教材选择性必修第二册教学内容：Unit 5 A Delicate WorldMacquarie Island 第二课时：Understanding Ideas执教人：王逸聪/深圳市罗湖区罗湖高级中学Macquarie Island from Chaos to Conservationout of order 混乱protection 保护Look at the picture and answer the questions.What animals can you see in the picture?2

2、. What kind of changes would take place if cats, rats and rabbits were introduced to an environment like this?They would hunt the birds and eat the native vegetation, thus upsetting the local ecological balance.Penguins , an elephant seal , a wild bird_ adj. 中间的，半途的_ adv. 显著地_ n. 遗产，传统_ n. 栖居的动物_ n.

3、 企鹅_ n. 干预，介入New words and expressions:_ n. 栖息地_ n. 事件_ adv. 后来，随后_ n. 胃口，食欲_ v. 大大增加，倍增_ v. 应该做halfwaydramaticallyheritageowemultiplyappetitesubsequentlyincidenthabitatpenguininterventioninhabitant_ n. 植物，草木_ n. 侵蚀_ n. 大混乱，紊乱_ n. 保护_ n. 病毒_ n. 附言New words and expressions:_ v. 使变少，使减少_ n. 夹子，陷阱_ n.

4、离开_ v. 倒坍，塌下_ adj. 大量的，多的_ n. 生态vegetationerosionchaosecologysubstantialcollapsedeparturetrapdecreaseviruspostcriptprotectionTo analyse how Macquarie Island was saved from destruction.To inform readers of the chaos caused on Macquarie Island by Humans.To entertain readers with a funny story about wh

5、at happened on Macquarie Island.To suggest ways in which an ecosystem can be protected. Listening to the tape:Choose the authors purpose in writing the passage and give your reasons.1 When did Macquarie Islands tragic story begin?A In 1870B When humans arrived on the island.C When humans planted man

6、y different plants there.D When people raised rabbits there.2 Which of the following animals wasnt brought to the island by humans?A Parakeets. B Cats. C Mice. D Rabbits.Fast readingRead the passage again and answer the following questions.3 Which way was mentioned to remove rabbits?A Using traps an

7、d dogs.B Raising more cats.C Releasing a virus onto the island.D Killing them.4.According to the passage, which of the following is right?A Macquarie Island became a nature reserve in the 1980s.B The last Macquarie Island cat disappeared in 1990.C The virus solved the rabbit problem.D Rabbits develo

8、ped an immunity to the virus and their numbers exploded once again.Read the para. 1 and think:From what aspects does the writer introduce the island?1. Location1486km1294km2. Shape long and thin How was the shape formed? Strong winds and stormy seas sculpted its shape. In the _ ocean , _ between Aus

9、tralia and Antarctic.South-west Pacifichalfway3. landscapeGreen grass; bare rock; a wild and natural beauty Careful Reading 4. Inhabitants royal penguins ; king penguins; elephant sealsHumans arrived in 1810To control rats and miceTo be a source of food for humans took over the islandate birds eggsA

10、ttacked baby birdsPurposesPurposesResults Results Results Developed an appetite for birdsmultiplied quicklyate the native vegetationdug holescaused soil erosionmore rabbits meant more catsRead para 2 & 3, what happened to Macquarie Island before the 1970s ? While the cats away, the mice will play.Ti

11、me In the 1970s In the 1980sactions resultsThe large number of mice and rats ?The remaining 10000 rabbits ?Disastrous results in 2006Caused some land to collapseKilled a substantial number of penguinsRemove all the invading species once and for all.Fill in the following blanks with information in pa

12、ra.4-5Became an official nature reserve; A virus was released to control rabbits Traps and dogs - catch the catsRabbits were reduced to 10000.The cats killed more native birdsThe last cat was caught in 2000Rats started to increase1. Whats the authors mission on the island? Remove the last remaining

13、invading species 2. How do you understand the sentence “ we human owe it to the island to give it a happy ending.” at the end of the passage ? It is humans that have caused great damage to the island and it is our duty to help it return to normal.Read the last paragraph with the following questions.

14、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.3. How could similar situations be avoided in the future? Careful Reading Postscript:In 2014, Macquarie Island is pest-free and its eco

15、logy is on the road to recovery.In 2016, the permanent scientific research station was closed down. Better late than never！ Qinling villas Kubuqi desert In 2014, Macquarie Island is pest-free and its ecology is on the road to recoveryIn 2016, the permanent scientific research station was closed down.Are there similar situations in our cou