选修6unit4公开课.ppt

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,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,atmosphere,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 earth.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 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 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,1.Greenhouse effect is a natural p,_.,_ amounts of Greenhouse gases in the atmosphere.But the problem begins when we add huge q,of extra carbon dioxide to the atmosphere.Therefore,more heat energy is t,in the atmosphere causing the global temperature to _.,Fill in the blanks about the,causes,of Greenhouse 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 around 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 they 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 rise,severe storms,floods,droughts,famines,the spread of diseases,disappearance of species,Positive effects,Negative effects,cause the sea level to rise,severe storms,floods,droughts,famines,the spread of diseases,disappearance of species,Positive effects,Negative effects,make plants grow quicker,crops will produce more,a greater range of animals,make 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,。