国际交流英语视听说B4U2-PPT.ppt

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1、国际交流英语视听说国际交流英语视听说国际交流英语视听说国际交流英语视听说Unit 2Protecting Our PlanetBook 4国际交流英语视听说国际交流英语视听说国际交流英语视听说国际交流英语视听说Think and DiscussViewing the WorldExploring the ThemeAnalytical ListeningSharing Your IdeasEngagingFurther ListeningContent国际交流英语视听说国际交流英语视听说Think and DiscussUnit 2 Unit 2 Protecting Our PlanetPr

2、otecting Our PlanetT Think and Discusshink and DiscussQuestionsAn endangered turtle floats over a dead coral reef.1.Look at the photo and read the caption.What do you imagine this scene looked like 50 or 60 years ago?What caused the change?2.What are some reasons that animals become extinct?3.Who do

3、 you think should be responsible for protecting endangered species?Governments?Companies?Citizens?T Think and Discusshink and DiscussExample AnswersFifty or 60 years ago,the scene was probably much more colorful,with different species of live coral and different kinds of fish.The damage was probably

4、 caused by human activities such as commercial fishing or scuba diving.Rising ocean temperatures from global warming can also cause the death of coral reefs.Questions1.Look at the photo and read the caption.What do you imagine this scene looked like 50 or 60 years ago?What caused the change?T Think

5、and Discusshink and DiscussExample Answers Species can become extinct due to over-hunting or over-fishing,climate change,loss of habitat,or competition from invasive species.Questions2.What are some reasons that animals become extinct?T Think and Discusshink and DiscussExample Answer 1I think govern

6、ments should be responsible for protecting endangered species because they have the power to pass and endorse laws that protect the species.Questions3.Who do you think should be responsible for protecting endangered species?Governments?Companies?Citizens?T Think and Discusshink and DiscussExample An

7、swer 2I think companies should be responsible for protecting endangered species because they sometimes cause environmental damage,and they have financial resources.Saving an endangered species might also be good for a companys public image.Questions3.Who do you think should be responsible for protec

8、ting endangered species?Governments?Companies?Citizens?T Think and Discusshink and DiscussExample Answers 3I think citizens should be responsible for protecting endangered species because governments and companies have not done enough.Citizens should join together to protect these species through ed

9、ucation and public pressure on companies and governments.Questions3.Who do you think should be responsible for protecting endangered species?Governments?Companies?Citizens?国际交流英语视听说国际交流英语视听说Exploring the ThemeUnit 2 Unit 2 Protecting Our PlanetProtecting Our PlanetE Exploring the Themexploring the T

10、hemeProtecting Our PlanetInternational Union for Conservation of Nature(IUCN):the worlds oldest and largest global environmental organization founded in 1948.With more than 1,200 member organizations,today it is a leading authority on the environment protection and sustainable development.Almost 11,

11、000 scientists and experts from the world do volunteer work for it.世界自然保护联盟E Exploring the Themexploring the ThemeA|Look at the photos and read the captions.Then discuss the questions.1.Lions and other types of big cats are dying at a rapid rate.What do you think is the biggest threat to these anima

12、ls?2.If a plant species becomes extinct,what effect does this have on the environment?Protecting Our PlanetE Exploring the Themexploring the ThemeAn African lion rests near a tree in Botswana.Over the past 20 years,many African lions have died.Protecting Our PlanetE Exploring the Themexploring the T

13、hemeAround the planet,human impact has resulted in the destruction of animal and plant life.Now conservationists are trying to save these plants and animals from extinction.Once a plant or animal is extinct,there will be no living members of that species left on the planet.Protecting Our PlanetE Exp

14、loring the Themexploring the ThemeAround the planet,human impact has resulted in the destruction of animal and plant life.Now conservationists are trying to save these plants and animals from extinction.Once a plant or animal is extinct,there will be no living members of that species left on the pla

15、net.Protecting Our PlanetE Exploring the Themexploring the ThemeExample AnswersThe biggest threat to big cats is probably hunting.People want their skins,or in some cases,they might think the big cats are a threat to people or to domestic animals.Habitat loss could be another factor that is endanger

16、ing big cats.1.Lions and other types of big cats are dying at a rapid rate.What do you think is the biggest threat to these animals?Protecting Our PlanetE Exploring the Themexploring the ThemeExample AnswersIf a plant species becomes extinct,then any insect species or animal that depends on it could

17、 go without food and shelter.In addition,plants are important to the soil and the air,so losing a plant species could have several negative effects on the environment.2.If a plant species becomes extinct,what effect does this have on the environment?Protecting Our PlanetE Exploring the Themexploring

18、 the ThemeB|Look at the chart.Then discuss the questions.Each year,the International Union for Conservation of Nature studies plants and animals.Many of the species studied are threatened or at risk of dying.The graph shows the percentage of threatened species in each category.The numbers at the top

19、 of the bars show how many species were studied.Protecting Our PlanetE Exploring the Themexploring the Theme1.Which group is the most threatened?Which is the least?2.Which categories of species are common in China?Protecting Our PlanetE Exploring the Themexploring the ThemeExample Answers Tropical p

20、alms have the greatest percentage of species in danger,while lobsters,on the other hand,have the smallest percentage and number of species in danger.Therefore,tropical palms are the most threatened and lobsters are the least threatened.1.Which group is the most threatened?Which is the least?Protecti

21、ng Our PlanetE Exploring the Themexploring the ThemeExample AnswersAll of the categories of species are common in China except for tropical palms,which can be only seen in several provinces.Coral reefs used to be common in the oceans around China,but a majority of the reefs have been destroyed due t

22、o over-fishing and pollution.2.Which categories of species are common in China?Protecting Our Planet国际交流英语视听说国际交流英语视听说Analytical ListeningUnit 2 Unit 2 Protecting Our PlanetProtecting Our PlanetA Analytical Listeningnalytical ListeningListening 1 dusky seaside sparrow n.海滨灰雀（主要分布在美国佛罗里达州的梅里特岛，已经绝迹）h

23、abitat n.（植物的）生长地；（动物的）栖息地Merritt Island 梅里特岛（位于美国东部佛罗里达州）steelhead trout n.硬头鳟enforce v.执行，实施（规定或法律）Idaho 爱达荷州（美国西北部州）deforestation n.砍伐树林buckwheat n.荞麦A Analytical Listeningnalytical ListeningListening 1 Endangered Species Act(ESA):a U.S.environmental law which was passed in 1973.It was designed t

24、o help protect plants and animals that are threatened by extinction as a result of human activities.濒危物种法案A Analytical Listeningnalytical ListeningListening 1 People generally speak more quickly than they can write.To take good notes quickly while listening to a lecture,we should write only the most

25、 important ideas.Here are some tips:Write only the key words.Dont write complete sentences.Use abbreviations(short forms)and symbols when possible.Indent specific information,such as examples.A Analytical Listeningnalytical ListeningA|Predicting Content.Form a group with two or three other students.

26、Look at the photos and read the caption.Then discuss the questions below.Listening 1 The dusky seaside sparrow was a bird species of southern Florida.A Analytical Listeningnalytical ListeningA|Predicting Content.Listening 1 1.The dusky seaside sparrow is now extinct.What kind of habitat do you think

27、 this bird lived in?2.What do you think are some possible causes for its extinction?A Analytical Listeningnalytical ListeningListening 1 Example Answers1.The dusky seaside sparrow is now extinct.What kind of habitat do you think this bird lived in?The bird is sitting on a branch,so it must have live

28、d in places with trees.Southern Florida is also a warm place with a lot of wetlands.A Analytical Listeningnalytical ListeningListening 1 Example Answers2.What do you think are some possible causes for its extinction?The bird may have become extinct because of habitat loss,environmental pollution,or

29、disease.(Its a small bird,so people wouldnt want to hunt it.)A Analytical Listeningnalytical ListeningB|Note-Taking.Listen to the first part of a guided tour and look at a students notes.Notice the use of key words,indentations,abbreviations,and symbols.Listening 1 A Analytical Listeningnalytical Li

30、steningC|Pair Work.Work with a partner.Using the notes from exercise B,retell the first part of the guided tour in complete sentences.Use your own words.Listening 1 A Analytical Listeningnalytical ListeningListening 1 Example AnswersThe dead bird in the jar is the dusky seaside sparrow,a small bird

31、that lived on Merritt Island in southern Florida,but which is now extinct.The species became extinct when people used chemicals to kill the mosquitos on the island.Those chemicals altered the wetlands so they were no longer a good habitat for the sparrow.A Analytical Listeningnalytical ListeningTour

32、 Guide:OK,everyone,heres our next exhibit.Do you see the body of the little bird in that bottle?That is a dusky seaside sparrow.It was an old male that died on June 16,1987.Its kind of sad because he was the very last dusky seaside sparrow in the world.Theyre now extinct.Yes,you have a question?Male

33、:Do you know why they became extinct?Tour Guide:Basically,they lost their habitat.See,the dusky seaside sparrow lived only in one placeon Merritt Island in Florida.The island had a lot of mosquitoes and wetlands.The people on Merritt Island used chemicals to kill the mosquitoes.Those chemicals were

34、also very harmful to the sparrows,and many died.In addition,the people on Merritt Island tried to control and exploit the wetlands.As they altered them,the wetlands were no longer a good habitat for the sparrows.The birds died one by one until there werent any left.Listening 1 A Analytical Listening

35、nalytical ListeningA|Note-Taking.Listen to the guided tour and complete the notes.Be sure to use key words,abbreviations,and symbols.Notice the indentations.A Guided TourListening 1 Endangered Species Act(ESA)1973Protects animals and their _ Ex.:_Ongoing conflict between _ and _ Ex.:_ESA protects _;

36、ranchers feellaw violates _habitatssteelhead trout in Washington statelandownersgovernmentgray wolf in Wyoming and Idaholandtheir rightsA Analytical Listeningnalytical ListeningA|Note-Taking.Listening 1 Endangered Species TodaySituation today is _ than in 19731._ species listed as _ or _2.Since 1973

37、 only _ species removed from list3.BUT only _ removed because they recovered;_ became extinct,others listed by mistake4._ more species may soon be added to listworse 1,300endangeredthreatened39149300A Analytical Listeningnalytical ListeningA|Note-Taking.Listening 1 ConclusionEven w/ESA in place,_ no

38、t making much progressA Analytical Listeningnalytical ListeningListening 1 B|Listening for Main Ideas.Read the questions and answer choices.Then listen again and choose the correct answers.Use your notes from exercise A to help you.1.What is the main topic of the talk?a.Why the dusky seaside sparrow

39、 became extinct.b.The difficulties of protecting both animals and their habitats.c.Reasons that the Endangered Species Act isnt working.bA Analytical Listeningnalytical ListeningListening 1 B|Listening for Main Ideas.Read the questions and answer choices.Then listen again and choose the correct answ

40、ers.Use your notes from exercise A to help you.2.What does the Endangered Species Act protect?a.Endangered animals and their habitats.b.Endangered animals but not their habitats.c.Animal habitats but not endangered animals.aA Analytical Listeningnalytical ListeningListening 1 B|Listening for Main Id

41、eas.Read the questions and answer choices.Then listen again and choose the correct answers.Use your notes from exercise A to help you.3.What has happened since the passage of the Endangered Species Act?a.The number of species that are endangered has greatly decreased.b.The number of species that are

42、 endangered has increased a lot.c.The number of species that are endangered has not changed much.cA Analytical Listeningnalytical ListeningListening 1 The Miami blue butterflyDiscussion.Work with your partner.How might the extinction of the dusky seaside sparrow have been prevented?Explain your idea

43、s.A Analytical Listeningnalytical ListeningTour Guide:OK,everyone,heres our next exhibit.Do you see the body of the little bird in that bottle?That is a dusky seaside sparrow.It was an old male that died on June 16,1987.Its kind of sad because he was the very last dusky seaside sparrow in the world.

44、Theyre now extinct.Yes,you have a question?Male:Do you know why they became extinct?Tour Guide:Basically,they lost their habitat.See,the dusky seaside sparrow lived only in one placeon Merritt Island in Florida.The island had a lot of mosquitoes and wetlands.The people on Merritt Island used chemica

45、ls to kill the mosquitoes.To be continued Listening 1 A Analytical Listeningnalytical ListeningTour Guide:Those chemicals were also very harmful to the sparrows,and many died.In addition,the people on Merritt Island tried to control and exploit the wetlands.As they altered them,the wetlands were no

46、longer a good habitat for the sparrows.The birds died one by one until there werent any left.Female:So,if people were to blame,cant we make sure something like that never happens again?Tour Guide:Were trying.The situation with the dusky seaside sparrow makes one thing very clear.We need to protect e

47、ndangered animals.However,its a better strategy to protect the animals andtheir habitats,too.After all,if an animals habitat is destroyed,the animal will likely become extinct.To be continued Listening 1 A Analytical Listeningnalytical ListeningTour Guide:Were trying.The situation with the dusky sea

48、side sparrow makes one thing very clear.We need to protect endangered animals.However,its a better strategy to protect the animals andtheir habitats,too.After all,if an animals habitat is destroyed,the animal will likely become extinct.Thats why the Endangered Species Act,which was passed in the Uni

49、ted States in 1973,protects both endangered animals and their habitats.For example,the steelhead trout lives in rivers and streams on the west coast of the United Statesthe Columbia River in Washington state for instance.Recently,both the fish and the river came under the protection of the Endangere

50、d Species Act.To be continued Listening 1 A Analytical Listeningnalytical ListeningMale:But how can we protect large areas such as rivers and forests?No onenot even the governmentcan afford to buy or control all the land that endangered species live on.Tour Guide:Good point.In fact,thats what makes