《B6U4课文l理解》PPT课件.ppt

Unit 4,Global warming - Does it matter,Warming up,What kinds of energy do you know ? Where does all this energy come from ? What can we use energy for?,Wind energy is used as power to produce electricity .,Windmills风车,where electricity is produced by burning coals.,The coal power stations,in which oil is refined and made pure.,The Oil Refineries,a facility designed to convert nuclear energy into electricity.,A nuclear power plant,on the roof of a house on a bright sunny day are used to collect solar energy, making your house warm or heating your water.,Solar panels,are used to keep back water and raise its level for irrigation or for producing electricity, etc.,The Hydro-electric dams,What is the greenhouse made and used for?,Pre-reading,A greenhouse is made of glass and is used for growing plants, especially during cold weather.,How does it work? The air inside is warm because the glass traps the heat from the sun and keeps it from escaping. This makes the greenhouse heat up and so the plants can grow throughout the cold period.,What are the “greenhouse gases”? In the atmosphere surrounding the earth there are gases, which are called “greenhouse gases”, including carbon dioxide, methane (甲烷, 沼气) and water vapor.,What do you think greenhouse gases do? They trap heat from the sun and therefore warm the earth.,课前准备,全力投入会使你与众不同 你是最优秀的！ 你一定能做的更好！,请拿出你的 导学案、课本、双色笔 激情第一!,Checking answer,Task: A A D C,1.People accept Charles Keeling s data because he took accurate measurements. ( ) 2.Flooding could be one of the effects of future global warming. ( ) 3.George Hambley believes scientists are just guessing about the effects of global warming. ( ) 4.George Hambley is worried about the effects of carbon dioxide on plant growth. ( ) 5.It is clear what the effects of global warming will be. ( ),T,T,T,F,T,Discussion 合作探究,课堂的每一分钟都是至关重要的！,Task : Scan the text and find the useful phrases and difficult sentences.,depend on sb/sth to do,come about,due to,trap heat from the sun,heat up,greenhouse gases,compared to,on the one handon the other hand,there is no doubt that,consume energy,natural phenomenon,subscribe to,greenhouse effect,natural gases,huge quantities of,be trapped in,go up,per million,result in,as high/low as,a rise of several meters in the sea level,be opposed to,encourage a greater range of animals,build up,tend to,make accurate measurements,keep on warming,for decades or centuries,main idea,Part1 (para1),Introduce a debate over the issue of global warming,Part 2 (para2-3),Part 3 (para4-5),Part 4 (para6),Illustrate how global warming comes about,List two different attitudes among scientists towards global warming,Its up to readers to think and decide whether people should do sth about global warming or not,4 parts,Task : Read the text and pay attention to the difficult sentences, then try to translate them.,There is no doubt that the earth is becoming warmer and that it is human activity that has caused this global warming rather than a random but natural phenomenon. 翻译：_ 仿写：_ radio and television are important means of communication.（毫无疑问，收音机和电视机是信息交流的重要方式）。 _she will change her mind. (我拿不准她是否真的会改变想法)。,毫无疑问，全球在变暖，全球转暖是人为的，而不是随意的自然现象。,There is no doubt,I doubt whether,2.All scientists subscribe to the view that the increase in the earths temperature is due to the burning of fossil fuels like coal, natural gas and oil to produce energy. 翻译：_ that在句中引导_,对_进行解释说明. 在这种从句中，先行词多为 fact, news, idea, thought, question, reply, report, remark 等，且that不能省略。 仿写：Which journal does the library _? 图书馆订有哪些报刊？ They were all very much worried over the fact_ （对你生病这件事，他们都很焦虑）。,所有的科学家都赞成这种观点：全球气温的升高是由于燃烧化石燃料如煤，天然气和石油等产生的能量引起的,同位语从句,the view,subscribe to,you fell ill,3.It was a scientist called Charles Keeling, who made accurate measurements of the amount of carbon dioxide in the atmosphere from 1957 to 1997. 翻译：_ 此句是一个_.句型为_. 仿写：It was a room_. It was in the room_. (它是我们过去常在开会的房子)。 _ has broken the record. (是小明打破了纪录)。,有一位名叫查尔斯 吉林的科学家曾把1957-1997年期间大气层二氧化碳的含量做了精确的统计。,强调句型,it is/was that/who,where we would often have meetings,that we would often have meetings,It was Xiao Ming who/that,4.They also agree that it is the burning of more and more fossil fuels that has resulted in this increase in carbon dioxide. 翻译：_ 此句是一个_.result in 意思是_. 仿写：_.（努力终于成功）。 He_ and finished the job in time. (他的确努力工作，按时完成工作)。,他们还赞同下述观点：正是由于越来越多的燃烧化石燃料导致了二氧化碳的增加。,宾语从句(含带强调句型),Hard work results in success.,导致,did work hard,Sophie Armstrong did (wrote the magazine) article. The name of the magazine is “Earth care”.,2.What are the names of the three scientists mentioned in the article?,They are Dr.Janice Foster,Charles Keeling and George Hambley.,1.Who wrote the magazine article? What is the name of the magazine?,3.What do they think about global warming? Do they agree with one another?,They dont agree with each other. Some think the effects will be terrible, while some others believe that we should not worry about it.,Dr. Janice Foster thinks the effects of global warming could be very serious. George Hambley thinks global warming will be mild with few bad environmental consequences.,Step V Summary,The earth is becoming warming and all scientists _ _ the view that the increase in the earths temperature is due to the burning of fossil _. Some _ of this process are called _ gases, the most important one of which is _. We need these gases, but the problem begins when we add huge _ extra carbon dioxide into the atmosphere. It means that more heat energy _ to be trapped in the atmosphere causing the global temperature to _. A scientist called Charles Keeling found that the carbon dioxide in the atmosphere went up from around,subscribe to,fuels,greenhouse,byproducts,carbon dioxide,quantities of,tends,go up,315 parts to around 370 parts _ million in