人教版高中英语选修六课件Unit 4 Global warming Reading课件（30张）

课件30张PPT。Unit 4 Global WarmingWhat is the weather like today?extreme weather eventsdroughtfloodtyphoonTsunamihigh temperatureWhat has caused the extreme climate? The Earth Is Becoming Warmer – But Does It Matter? What are the two graphs about?The first graph shows the temperature increase of one degree Fahrenheit between 1860 to 2000. The second graph shows the carbon dioxide content in the atmosphere from 1957 to 1997.What’s the relationship between the two factors and global warming?Greenhouse Effect Global warmingGreenhouse gases(CO2) trap the heat from the sun, which causes the temperature of earth to go up. SkimmingTask 1: Sophie ArmstrongGlobal warming/ the warming of the earth.Dr Janice Foster, Charles Keeling, George Hambley Reading Made accurate measurements of the amount of CO2 Introduction of Greenhouse gases and Greenhouse effectPredict the global warming will be mild and positiveDr Janice FosterCharles KeelingGeorge HambleyTask 2: ComparingThe Outline of different opinionsGroup 1Group 2Group 3IntroductionPara. 1 Para.6-7Task 3 Scanning The organization of the article: BodyPara. 2-5 Conclusion Who writes this article? Sophie Armstrong of Earth Care Where does this article most probably come from? A. Newspaper B. Novel C. MagazineCareful readingPart1 (1)Introduction of global warming ?2. _____1. _____Part2 (2-5)How global warming comes about?the burning of fossil fuels human activityCarbon dioxideMethaneWhat are the Greenhouse gases?1. 2. 3.Water vapor Greenhouse effect go upcatastrophevery seriouspositiveproducea greater range of animalsPart3 (6-7)Different attitudes towards the effects of global warmingDebateGroup Workcause the sea level to rise the spread of diseases disappearance of species So we should : 1. Reduce the burning of fossil fuels 2. Use bags that can be recycled …make plants grow faster crops will produce more a greater range of animals make life better So we don’t worry about global warming… Possible effects:Negative effectsPositive effectsPost-reading1. Who found out the amount of carbon dioxide in the atmosphere from 1957 to 1977?A. Dr. Janice Foster. B. Charles Keeling.C. George Hambley. D. Sophie Armstrong.2. "But there are some very different attitudes among scientists towards this issue.”“issue" here means the same as the one in___ .A. I bought the new stamp the day of its issue. B. They are talking about one of the key issues in the election campaign.C. The government is expected to issue a statement about the election.D. The magazine has 12 issues each year.3. The author probably agrees that _____A. actually global warming is good for man.B. we should do nothing about the global warming.C. catastrophes will happen if the globe keeps on warming.D. a lot remains to be found out about the effects of global warming. Let’s have a competition: How much do you know about global warming? Group-work: （Finish Ex2 on Page 27. True or False?）1.The temperature last century didn’t increase much. 2.Everyone be ... ...