选修6unit4公开课.ppt

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1、Welcome to my class!,Unit 4 Global Warming,The Earth is Becoming Warmer-But Does It Matter?地球在变暖要不要紧？,Reading,New Words and expressions,temperature 温度 one degree Fahrenheit 华氏一度explore 探索human activities 人类活动phenomenon 现象 subscribe to 同意，赞成 fossil fuels 矿物燃料byproduct 副产品“greenhouse”gases 温室气体atmosph

2、ere 大气methane 甲烷，沼气,degree Celsius 摄氏度quantities of 大量的accurate measurements 精确的测量data 资料，数据catastrophe 大灾难be opposed to 反对environmental consequences 环境影响a great range of 大量的 even if 即使 keep on 继续,Skimming,Skim the title:THE EARTH IS BECOMING WARMER BUT DOES IT MATTER?,What is the main topic?The ear

3、th.B.Global warming.C.Becoming warmer doesnt matter.,The structure of the article:,Introduction,A title,Body,Conclusion,Skim the body part(7 paras):,Para.1,Para.2-3,I,II,Para.4-6,III,Para.7,IV,Introduction,Body,Conclusion,Match the main idea of each part:,Explain how global warming comes about.,Two

4、different attitudes among scientists towards the consequences of global warming.,Introduce the problem of global warming.,Give a warning and raise a question for the readers to think over.,I(1),II(2-3),III(4-6),IV(7),Who wrote the article?,What is the name of the magazine?,Careful reading:the first

5、paragraph:,Sophie Armstrong,Earth Care,Part II(Para2-3),Everyone believes that global warming is caused by the activities of humans.Janice Foster believes that she can measure the future global rise in temperature.Greenhouse Gases are totally bad.,F,T,F,Fill in the blanks about the causes of Greenho

6、use effect.,henomenon,uantities,rapped,go up,Small,Para 4.the levels of carbon dioxide have increased greatly over the last 100 to 150 years,Who made accurate measurements of the amount of carbon dioxide?2.How much has increased?,Charles Keeling,The carbon dioxide in the atmosphere went up from arou

7、nd 315 parts to around 370 parts per million.,Para 5.How high will the temperature go?,The amount of warming could be as low as 1 to 1.5 degrees Celsius,but it could be as high as 5 degrees.,What do Dr.Janice Foster and the scientist George Hambley think about the consequences of global warming?Do t

8、hey agree with one another?,Para 6,They dont agree with each other.,Dr.Janice Foster thinks it is serious.George Hambley thinks global warming will be mild with few bad environmental consequences.,Does global warming matter?,Positive effects,Negative effects,cause the sea level to risesevere stormsf

9、loodsdroughtsfaminesthe spread of diseasesdisappearance of species,Positive effects,Negative effects,cause the sea level to risesevere stormsfloodsdroughtsfaminesthe spread of diseasesdisappearance of species,Positive effects,Negative effects,make plants grow quickercrops will produce morea greater range of animalsmake life better,Disscussion:How to reduce greenhouse gases?,Have a disscussion with your classmates.,The earth is becoming warmer,does it matter?,Homework,1.Read the text again,and try to retell it.2.Find out the difficult sentences in the passage.,Thank You,