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,*,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版标题样式,*,品质来自专业,信赖源于诚信,金太阳教育网,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,*,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,*,Unit 4,Global Warming,How did,come,about,?,the snow,catastrophe,Some scientists believed that,global,warming was one of the,major,reasons why such,extreme,climate,like severe storms and heavy snow frequently came about.,孙广勇,造成极端天气频繁的一个重要原因就是全球变暖。,Think about:,What causes,global warming,?,Human activity,or a random but,natural phenomenon,?,When we talk about this problem,we naturally,link,it,to,the use of,energy,and,the environmental pollution,.,But firstly and importantly,energy,makes a great difference to,our lives.What things do we use energy for?,We _energy to do many things in our lives.For axample,energy _our cities and _our buildings.What other things do we use energy,for,?,depend on,lights,heats,Things that use energy around us or at any other places:,In a house,Where,does all this energy,come,from,?,Place and,the,related,energy,Wind power,wind,Place and,the,related,energy,a coal power station,coal,Place and,the,related,energy,oil,refinery,（提炼厂）,oil,Place and,the,related,energy,nuclear power,station,Uranium,铀,Place and,the,related,energy,solar,panels,（镶板）,solar power,Place and,the,related,energy,a,hydro,-electric,power,（与水有关的）,water,Energy at,home,school,sources of energy,things using energy,Lights,Heating,Television,Cassette player,Video recorder,Computer,Fridge,Stove,Washing machine,Hairdryer,Coal,Oil,Natural gas,Wind(wind power),Sun(solar energy),Uranium(nuclear energy),Water(hydro-electric power),Energy at,home,school,sources of energy,renewable,or,non-,renewable,Coal,Oil,Natural gas,Wind(wind power),Sun(solar energy),Uranium(nuclear energy),Water(hydro-electric power),Non-renewable,Non-renewable,Non-renewable,Renewable,Renewable,Non-renewable,Renewable,Lets try to save energy!To save energy is to save our earth!,Slogan,slugn,-,n.,标语,口号,As we know,coal,oil and natural gas are called,_,which is a kind of energy.It can,make a great _to,our lives.But do you know what,by,_,is produced when we burn fossil fuel?Is it good for our planet?What,ph,_ is caused by,it,?,difference,enomenon,product,fossil fuel,Fossil Fuel,Carbon dioxide,Fossil Fuel,coal,oil,natural gas,global warming,Why?,Picture reading,A greenhouse,greenhouse,Picture reading,A,greenhouse,is made of,_ and,is used for,growing _,especially during,_ weather,.,What is a greenhouse made of and used for?,glass,plants,cold,The air inside is warm because the glass _ the heat from the sun and,keep,s it,from,_.This makes the greenhouse _ and so the plants can grow _.,traps,escaping,heat up,throughout the cold period,How does a greenhouse work?,Now can you,connect,global warming,with,greenhouse and think of the relationship between them?Maybe you can understand why we call global warming“,greenhouse effect,”,right?,Whats greenhouse effect?,greenhouse effect,Surely we need greenhouse gases.Without greenhouse effect,the earth would be_.,In the atmosphere surroudning the earth there are gases called“,greenhouse gases,”.What do you think greenhouse gases do?,It is a pity that human activity gives off extra _into the atmosphere therefore it causes_.,too cold,carbon dioxide,global warming,Reading,Task 1 Skimming,Skim the title:,THE EARTH IS BECOMING WARMER BUT DOES IT MATTER?,What is the main topic?,A.The earth.B.Global warming.,C.Becoming warmer doesnt matter.,W,ho wrote the article?,W,hat is the name of the magazine?,What are the names of the 3 scientists?,Sophie Armstrong,Earth Care,Dr Janice Foster,Charles Keeling,George Hambley,P 27 Ex.1,Listen to the,magazine article,and answer the following questions.Comprehending One,Skimming,The organization of an expositive:,Introduction,A title,Body,Conclusion,Skimming,Skim,the main text,:,Para.1,Para.2-3,I,II,Para.4-8,III,Para.9,IV,I,ntroduction,Body,Conclusion,Skimming,Match the parts with the main ideas:,Explain how global warming,comes about,.,List two different attitudes among scientists towards global warming.,Introduce a debate over global warming.,Its up to readers to think and decide whether people should do something about global warming or not.,I,(1),II,(2-3),III,(4-8),IV,(9),Scanning,Match the parts with the writing skills:,Using,a question,leaving readers to think over the issue,Raising a question,Giving examples,making contrast(,comparison,),Giving examples,using,graph,s,explanation,I,(1),II,(2-3),III,(4-8),IV,(9),I,(1),II,(2-3),III,(4-8),IV,(9),Page 27 Ex.2,T,or,F,1.The temperature,in the last,century didnt,seem to increase,much.,2.Everyone,believes that global warming is caused by the activities of humans.,3.Janice Foster believes that,she can measure the future global,rise in temperatrue,4.The rise in carbon dioxide is causing a steady in crease in global warming.,5.George Hambley believes scientists are just guessing about the effects of global warming.,6.It