外研版高中英语必修3《odule 4 Sandstorms in Asia Listening and vocabulary》优课导学案_8

The Fourth PeriodListening&VocabularyTeaching goals1. Language targets1)Important vocabularyatmosphere, carbon dioxide, chemical, environment, garbage, melt, pollution, recycle, coastal, concerned, evidence, major, urgent, pollute.2)Important sentencesTrees take in carbon dioxide and give out oxygen.I can’t help but feel very concerned.2. Ability goalsEnable the students to understand the damage caused by natural disasters.Enable the students to have a good understanding of the importance of protecting environment.3.Teaching important pointsListen to the speech about environmental problems made by an expert and different measures taken by different countries.4.Teaching difficult pointsListen for correct information and find out ways to solve the problems.5.Teaching methodsListening& Cooperative learning.6.Teaching aidsMultimedia7.Teaching procedures & waysStep I. Lead-inAsk the students to look at the pictures , and finish the sentences.The______is so beautiful.There is_________, and the___________ is polluted.Suggested answers:environment/pollution/atmosphereStep II. Vocabulary preparationAsk the students to turn to page 35, and give them 3 minutes to match the words in the box with their definitions, then check the answers in class1. the air around the earth2. to have a bad effect on someone or something3. a substance used in chemistry4. the natural world- the land,air,water,plants and animals5. to change from solid to liquid,e.g.ice becomes water6. to treat something so that we can use again7. one of the gases in the air8. the most northern and southern points on earth9.rubbish10 damage to the environment because of chemicalsSuggested answers:atmosphere/damage/chemical/environment/melt/recycle/carbon dioxide/the Poles/garbage/pollutionStep III Listening for main topicsRequire the students to listen to an environmental expert`s speech ，and then put thetopics below in the order you hear them.A garbageB treeC pollution from carsD melting ice at the PolesE the climateSuggested answers:E D C B AStep IV Listening for detailed informationExercise1Ask the students to read the following questions first, then play the expert`s speech again, and require them to try their best to get the answers(It may need another playing. That depends!)1.What is the most urgent problem of all?2.What examples of coastal cities does David give?3.Why is the climate getting warmer?4.What is described as a major problem?5.What happens when we cut down a lot of trees?6.How does the interviewer feel about the situation?Suggested answers:1.The climate2.New York and Shanghai.3.Because pollution is stopping the sun’s heat leaving the atmosphere.4.Carbon dioxide from cars.5.There is less oxygen and more carbon dioxide in the atmosphere.6.Optimistic.Exercise2Ask the students to go though the dialogue between the two persons, then play the conversation twice for the students, the first time for getting information, the second time for checking answers.Int:David, what do you see as the main problems with the ____________?D.U:Well, ____________, the most ______ problem of all is the ________. The world’s climate seems to be getting warmer.Int: We’ve seen ________________ of that, haven’t we? _______summers, ________ winters, that kind of thing.D.U: Yes, we have. Also, scientists have found that the ice at the Poles is beginning to ______.Int: We’ve heard that too. Is that really happening?D.U:Yes, I’m afraid it is. Ad ___________ in the future, the ice may melt ___________. Then it’s possible that the sea could rise and ___________ like New York and Shanghai could disappear under water.John: It sounds very ____________.D.U: I couldn’t agree with you more. It’s _______!Int: Can you explain why the climate’s getting warmer?D.U:Well, I’ll do my best! It’s __________ that’s the problem. Gases from cars enter the __________ and _____ the sun’s heat from ________ the atmosphere. And factories _________ chemicals that do the same thing. So __________, the climate is getting warmer.John: Int: From __________________, carbon dioxide from cars is a major problem.D.U:You’re absolutely right. Carbon dioxide is the gas that does most _________ to the atmosphere. But we have a problem with trees too. You see, trees ________ oxygen and _______ carbon dioxide. So they’re very useful because they ______the carbon dioxide.Int:I know what you’re going to say. We’re _______ all the trees.D.U: Yes, we cut them down because we need the land and because we use the wood for paper and _________. That leaves more carbon dioxide in the atmosphere.Int:It’s a terrible _________.D.U: Yes, and another problem is _______________ that we produce. We burn a lot of garbage, and once again, the gases pollute the atmosphere. That situation couldn’t be worse, really.Int:We should _________ garbage, not burn it.D.U: Of course we should.Int:It’s strange, we know all this, and yet we do___________it. I can’t help but feel very __________.D.U: Yes, well, it is __________. But governments are beginning to do something about it. I don’t think it’s too late.Suggested answers:environment/in a nutshell/urgent/climate/a lot of evidence/Hotter/warmer/melt/at sometime/completely/coastal cities/frightening/scary/pollution/atmosphere/stop/leaving/give out/as a result/what I understand/damage/give out/take in/use up/cutting down/furniture/situation/all the garbage/recycle/nothing but talk about/concerned/worryingStep IV HomeworkToday we have listened to a material. We know that our environment is facing many problems. Although the situation is worrying, we shouldn`t lose hope, because the governments are trying to change it. After class, you should listen to it again and sum up what you have learnt. For the homework, think about a question: What should you do in your daily life to protect our environment?。