B6U4课文l理解课件

1、B6U4课文l理解PPT课件Unit 4Global warming -Does it matterB6U4课文l理解PPT课件Warming up What kinds of energy do you know ? Where does all this energy come from ? What can we use energy for?B6U4课文l理解PPT课件Wind energy is used as power to produce electricity . Windmills风车风车B6U4课文l理解PPT课件where electricity is produced

2、 by burning coals.The coal power stationsB6U4课文l理解PPT课件in which oil is refined and made pure. The Oil RefineriesB6U4课文l理解PPT课件a facility designed to convert nuclear energy into electricity.A nuclear power plantB6U4课文l理解PPT课件 on the roof of a house on a bright sunny day are used to collect solar ener

3、gy, making your house warm or heating your water.Solar panelsB6U4课文l理解PPT课件are used to keep back water and raise its level for irrigation or for producing electricity, etc.The Hydro-electric damsB6U4课文l理解PPT课件What is the greenhouse made and used for?Pre-readingB6U4课文l理解PPT课件B6U4课文l理解PPT课件B6U4课文l理解PP

4、T课件 A greenhouse is made of glass and is used for growing plants, especially during cold weather.B6U4课文l理解PPT课件 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 t

5、he cold period.B6U4课文l理解PPT课件 What are the “greenhouse gases”? In the atmosphere surrounding the earth there are gases, which are called “greenhouse gases”, including carbon dioxide, methane (甲烷甲烷, 沼气沼气) and water vapor.B6U4课文l理解PPT课件 What do you think greenhouse gases do? They trap heat from the su

6、n and therefore warm the earth.B6U4课文l理解PPT课件课前准备课前准备 全力投入会使你与众不同全力投入会使你与众不同 你是最优秀的你是最优秀的！ 你一定能做的更好你一定能做的更好！请拿出你的请拿出你的导学案、课本、双色笔导学案、课本、双色笔激情第一激情第一!B6U4课文l理解PPT课件要要求求1.红笔迅速修改；红笔迅速修改；认真思考错因。认真思考错因。2.如有疑问红笔标出留待讨论。如有疑问红笔标出留待讨论。目目标标达达成成A层层养成扫描式速读能力，问题全对养成扫描式速读能力，问题全对B层层在文中找到答案，问题全对。在文中找到答案，问题全对。C层层能够在文中标

7、出每个问题的答案能够在文中标出每个问题的答案Checking answerTask: A A D C B6U4课文l理解PPT课件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 war

8、ming. ( )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. ( )TTTFTB6U4课文l理解PPT课件内内容容1.自主学习中的疑难点。自主学习中的疑难点。2.探究案探究案5个大题。个大题。要要求求1.全体起立，组内讨论解答疑问，凳子轻放于课桌下，讨论全体起立，组内讨论解答疑问，凳子轻放于课桌下，讨论完成坐下。完成坐下。2. 组长协调好本组讨论内容及进度，

9、保证高效完成组长协调好本组讨论内容及进度，保证高效完成3. 组长组长安排好展示及点评人员，重点帮助弱科生安排好展示及点评人员，重点帮助弱科生。评评价价讨论投入、热烈状态分别加讨论投入、热烈状态分别加10、8、6分分Discussion 合作探究合作探究B6U4课文l理解PPT课件Task : Scan the text and find the useful phrases and difficult sentences.depend on sb/sth to docome aboutdue totrap heat from the sunheat upgreenhouse gasescomp

10、ared toon the one handon the other handthere is no doubt thatconsume energynatural phenomenonsubscribe togreenhouse effectnatural gasesB6U4课文l理解PPT课件huge quantities of be trapped ingo upper millionresult inas high/low asa rise of several meters in the sea levelbe opposed toencourage a greater range

11、of animalsbuild uptend tomake accurate measurementskeep on warmingfor decades or centuriesB6U4课文l理解PPT课件 main ideaPart1 (para1)Introduce a debate over the issue of global warmingPart 2 (para2-3)Part 3 (para4-5)Part 4 (para6)Illustrate how global warming comes aboutList two different attitudes among

12、scientists towards global warmingIts up to readers to think and decide whether people should do sth about global warming or not 4 partsB6U4课文l理解PPT课件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

13、that it is human activity that has caused this global warming rather than a random but natural phenomenon. 翻译：翻译：_仿写：仿写：_ radio and television are important means of communication.（毫无疑问，收音机（毫无疑问，收音机和电视机是信息交流的重要方式）。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

14、转暖是人为的，而不是随毫无疑问，全球在变暖，全球转暖是人为的，而不是随意的自然现象。意的自然现象。There is no doubtI doubt whetherB6U4课文l理解PPT课件2.2.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：翻译：_that在句中引导在句中引导_,对对_进行解释说明进

15、行解释说明. 在这种从句中，先行词多为在这种从句中，先行词多为 fact, news, idea, thought, question, reply, report, remark 等，且等，且that不能省略。不能省略。仿写：仿写：Which journal does the library _?图书馆订有哪些报刊？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）。（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

16、化石燃料如煤，天然气和石油等产生的能量引起的燃烧化石燃料如煤，天然气和石油等产生的能量引起的同位语从句同位语从句the viewsubscribe to you fell illB6U4课文l理解PPT课件3.3.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：翻译：_此句是一个此句是一个_.句型为句型为_. 仿写：仿写：It was a room_.It

17、 was in the room_. (它是我们过去常在开会的房子它是我们过去常在开会的房子)。_ has broken the record. (是是小明打破了纪录小明打破了纪录)。有一位名叫查尔斯有一位名叫查尔斯 吉林的科学家曾把吉林的科学家曾把1957-1997年年期间大气层二氧化碳的含量做了精确的统计。期间大气层二氧化碳的含量做了精确的统计。强调句型强调句型 it is/was that/whowhere we would often have meetingsthat we would often have meetingsIt was Xiao Ming who/thatB6U4课

18、文l理解PPT课件4.4.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：翻译：_此句是一个此句是一个_.result in 意思是意思是_.仿写：仿写：_.（努力终于成功）。（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他们还赞同下述观点：正是

19、由于越来越多的燃烧化石燃料导致了二氧化碳的增加。料导致了二氧化碳的增加。宾语从句宾语从句(含带含带强调句型强调句型)Hard work results in success.导致导致did work hardB6U4课文l理解PPT课件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 F

20、oster,Charles Keeling and George Hambley.1.Who wrote the magazine article? What is the name of the magazine?B6U4课文l理解PPT课件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

21、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.B6U4课文l理解PPT课件Step V Summary The earth is becoming warming and all scientists _ _ the view that the inc

22、rease 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 tofue