选修六Unit4 Global warming Period 6.doc

Period 6　Summing Up，Learning Tip and Assessment 教学内容分析　　　 This is the last teaching period of this unit，so the emphasis should be placed on going over and summarizing what has been learned in this unit.It includes the following parts：Summing Up，Learning Tip，Checking Yourself and some other consolidation exercises. Summing Up summarizes the whole unit from the aspects of topics and vocabulary and grammar.The teacher can first use this part to let students sum up what they have learned in this unit and then let them find out what they can't understand very well. Learning Tip gives students instructions on which kind of nouns begin with a capital letter.Let the students think about what they already know about the rules and what new information they will find. Checking Yourself on Page 68 in the Workbook aims at encouraging students to make a self－assessment after they finish learning this unit.It is very important to improve their learning.Of course，a testing assessment is also needed. In this period，the teacher can also provide more practice to consolidate what students have learned in this unit. 三维目标设计　　　 Knowledge and skills 1．To get students to master all the useful new words and expressions in this unit. 2．To have students understand the new grammar item “the use of ‘it’(2)” better，and enable them to use the sentence patterns correctly. 3．To develop the students' ability to use the important language points in this unit. Process and methods Design some additional exercises for students to do in order that they can learn to use and grasp all the contents. Emotion，attitude and value 1．To encourage students to learn more about global warming and environmental protection. 2．To inspire the students to think up more effective measures to prevent global warming. 教学重、难点　　　 Using what they have learned in this unit to solve real problems. Step 1　Revision 1．Check the homework exercises. 2．Dictate some useful new words and expressions in this unit. Step 2　Lead－in Ask the students to turn to Page 32.Think about what they have learned in this unit and tick the boxes to see how well they have learned them. Step 3　Summing up Five minutes for the students to summarize what they have learned in this unit by themselves.Then check and explain something where necessary. Suggested answers： Write down what you have learned about global warming： (Students' answers may vary.)The temperature of the earth rose about one degree Fahrenheit during the 20th century.It is human activity that has caused this global warming.All scientists subscribe to the view that the increase in the earth's temperature is due to the burning of fossil fuels.Some byproducts of this process are called greenhouse gases，which trap heat and warm the earth.Without the greenhouse effect，the earth would be cooler than it is.But scientists don't agree with each other on the effects of global warming.Some think it will be a disaster，but some others think it's a good thing and we can do nothing to prevent the trend.By reading the second passage，we also know some easy and effective measures we can take to deal with global warming. From this unit you have also learned： Some useful words：tend，oppose，state，glance，quantity，range，tendency，circumstance，opposed，steady，widespread，average，consume，subscribe，advocate，refresh，graph，phenomenon，fuel，data，trend，catastrophe，flood，consequence，existence，commitment，pollution，growth，motor，can，microwave，educator，contribution，presentation，disagreement，random，mild，outer，electrical，casual，nuclear，per Some useful expressions：come about，subscribe to，quantities of，go up，result in，be opposed to，even if，keep on，on the whole，on behalf of，put up with，so long as，and so on，greenhouse effect New grammar item：the use of “it”—how to use “it” for emphasis in a sentence. Functional items：how to express agreement and disagreement，blame and complaint. Step 4　Practice Show the exercises on the screen or give out exercise papers. Part 1　Vocabulary 1．Researchers c______ living conditions in London with those in other places. 2．Their prices are low c______ to those in other shops. 3．I don't think anybody m______ to her apart from herself. 4．He prefers q______ to quality when food is concerned. 5．The d______ we have collected are not enough to be convincing. 6．Everything was in a s______ of disorder. 7．What is the a______ rainfall for August in your country? 8．Each i______ boy in the class has his own personalities. 9．We have been having a few a______ in the committee lately. 10．They were p______ in the history of music. 11．As a c______ of being in hospital，Shelly decided that she wanted to become a nurse. 12．A doctor has the t______ “Dr” in front of his name. 13．The number of the children in the school has d______ by 500 this year. 14．The cooker isn't working because of an e______ fault. 15．The food was cold and the guests quarreled—the whole dinner was a c______. Part 2　Useful phrases 1．在20 世纪期间____________ 2．导致____________ 3．另一方面____________ 4．通过燃烧化石燃料____________[来源:Zxxk.Com] 5．大量的____________ 6．忍受污染____________ 7．有关系，有影响____________ 8．大体上，基本上____________ 9．高达5摄氏度____________ 10．发生____________ Part 3　Complete the following sentences according to the texts. 1．An energy source is renewable when supplies of it never ______ ______. 2．It is a rapid increase ______ ______ ______ ______ ______. 3．There is ______ ______ that the earth is becoming warming but there is ______ ______ ______ whether it is ______ ______ ______has caused this global warming or whether it is ______ ______ ______ ______. 4．______ the greenhouse effect，the earth ______ ______ about thirty－three degrees Celsius ______ ______ ______ ______. 5．The ______ ______ of carbon dioxide ______ that more heat energy is trapped in the atmosphere ______ the ______ ______ ______ ______ ______. 6．It was ______ ______ ______ Charles Keeling ______ made ______ ______ ______ the amount of carbon dioxide in the atmosphere from 1957 to 1997. 7．They also believe ______ ______ the burning of more and more fossil fuels that is ______ ______ this increase in carbon dioxide. 8．There are some very different ______ among scientists ______ ______ ______. 9．Sometimes I feel that ______ can't have any ______ ______ ______ huge ______ problems. 10．Finally and most ______，talk ______ your family and friends ______ global warming and tell them what you have learned. 11．Remember—your ______ ______. Part 4　Multiple choice[来源:Zxxk.Com] 1．Is it ______ to you that the government is having a hard time now? A．of much important　　　　　　　 　B．of much consequence C．of very importance D．of much consequent 2．Something must be done to ______ the river from ______. A．stop；being polluted B．stop；polluting C．prevent；pollution D．keep；polluted 3．There ______ quantities of apples in the basket and there was ______ milk in the bucket. A．were；a number of B．was；quantities of C．was；a good many D．were；a quantity of 4．______ we get good weather it will be a successful holiday.Which is wrong? A．So long as B．Provided that C．So long D．On condition that 5．—Go for a picnic this weekend，OK? —______.I love getting close to nature. A．I don't think so B．I believe not C．I couldn't agree more D．I am afraid not 6．—Now，where is my purse? —______！ We will be late for the picnic. A．Come on B．Don't worry C．Take your time D．Take it easy 7．It was not until 1999 ______ regular radio broadcast began. A．while B．which C．that D．since 8．Can it be in the restaurant ______ we had dinner last Sunday ______ you left your wallet? A．where；where B．where；that C．that；where D．that；that 9．—What's the matter with you? —______ the window，my finger was cut unexpectedly. A．Cleaning B．To clean C．While cleaning D．While I was cleaning 10．The other day，my brother drove his car down the street at ______ I thought was a dangerous speed. A．as B．which C．there D．what Suggested answers： Part 1　Vocabulary 1．compared　pared　3.matters　4.quantity　5.data　6.state　7.average　8.individual　9.agreements　10.phenomena　11.consequence　12.title　13.decreased　14.electrical　15.catastrophe Part 2　Useful phrases 1．during the 19th century　2.lead to　3.on the other hand　4.through the burning of fossil fuels/by burning fossil fuels　5.a great deal of/scores of　6.put up with the pollution 7．make a difference　8.on the whole　9.as much as five degrees Celsius(5 ℃)　e about Part 3　Complete the following sentences according to the texts.[来源:学.科.网Z.X.X.K] 1．run out　pared to most natural changes　3.no doubt；fierce debate over；human activity that；just a natural phenomenon　4.Without；would be；cooler than it is　5.increased amount；means；causing；global temperature to go up　6.a scientist called；who；accurate measurements of　7.it is；resulting in　8.attitudes；towards this issue　9.individuals；effect on such；environmental　10.importantly；with；about　11.contribution counts Part 4　Multiple choice 1～5 BADCC　6～10 ACBDD Step 5　Learning tip Ask the students to turn to Page 32.Read through the passage and make sure they understand it.Encourage them to do as the passage tells because if they are doing so they will be teaching themselves a useful way of using English words. Step 6　Assessment 1．Checking yourself(on Page 68 in the Workbook) First get the students to think about these questions individually.Then they can discuss in groups sharing their experience.The teacher can join in and give them advice and suggestions where necessary. 2．Testing assessment Multiple choice[来源:学科网ZXXK] 1．______ with the size of the whole earth，the biggest ocean does not seem big at all. A．Compare B．When comparing C．Comparing D．When compared 2．Please tell me how the accident______.I am still in the dark. A．came by B．came out C．came to D．came about[来源:学+科+网] 3．The accident ______ the death of two passengers. A．resulted from B．resulted in C．resulted of D．resulted with 4．It is in the west of China ______ there is no doubt ______it is going to rain tomorrow. A．where；whether B．that；that C．that；whether D．where；that 5．It was 1969______ the American astronauts succeeded in landing on the moon. A．that B．when C．on which D．which 6．It was ______ back home after the experiment. A．not until midnight did he go B．until midnight that he didn't go C．not until midnight that he went D．until midnight when he didn't go 7．There's some doubt ______he'll keep his promise. A．whether B．if C．that D．which 8．The ______ parents were all ______for the children's safety. A．concerned；concerned B．concerned；concerning C．concerning；concerning D．concerning；concerned 9．The students ages ______ 15 to 18. A．range B．ranged C．range from D．ranges from 10．______，we'll go camping. A．Weather permits B．If weather will permit C．Weather permitting　 D．Weather permitted 11．______，we would have not finished the work on time. A．If you didn't help us B．Without your help C．Without you D．With your help 12．—I will not come here tomorrow. —______to me，because I don't care. A．It doesn't make any difference B．It makes much difference C．It doesn't make no difference D．It makes a difference 13．You can go out，______you promise to be back before 11 o'clock. A．as far as B．so far as C．when D．as/so long as 14．—I apologize for not being able to join you for dinner. —______.We'll get together later. A．Go ahead B．Not to worry C．That's right D．Don't mention it 15．Christmas is ______ special holiday when ______ whole family are supposed to get together. A．the；the B．a；a C．the；a D．a；the Suggested answers：1～5 DDBBB　6～10 CAACC　11～15 BADBD Step 7　Homework 1．Finish off the Workbook exercises. 2．Review and summarize what you have learned in Unit 4. Step 8　Reflection after teaching ________________________________________________________________________ ________________________________________________________________________ 6