选修六：unit4-Warming-up-and-reading(共50张)(课堂PPT).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,*,*,Book6,Unit 4,Global warming,1,Warming up,List,things that use energy,sources of energy,renewable/non-renewable,Words and expressions,2,From the following pictures,you will know where all this energy comes from.,windmills(,风车,),a coal power station,3,an oil refinery,a nuclear power plant,4,solar panels,a hydro-electric dam,5,Sample lists,light,heating,coal,non-renewable,oil,non-renewable,6,television,cassette player,video recorder,computer,natural gas,non-renewable,wind(wind power),renewable,sun(solar energy),renewable,uranium(nuclear energy),non-renewable,7,fridge,stove,washing machine,hairdryer,water(hydro-electric),renewable,plant waste(biomass energy),renewable,hot springs or geysers(geothermal energy),renewable,the sea(tidal energy),renewable,8,Renewable,or,non-renewable,?,9,Renewable,or,non-renewable,?,10,What is told in the picture?,11,non-renewable energy source,12,13,14,15,Carbon dioxide,coal,oil,natural gas,global warming,Why?,Fossil Fuels,16,Look at the pictures and what do you know about global warming.,17,18,What disasters are they?,Flood,Drought,famine,storm,19,Can you guess what cause these disasters?,What are the reasons of global warming?,20,smoke from,cars,smoke from,factories,cut down,trees,Plastic,bags,21,1.Have you ever seen a greenhouse?,Pre-reading,22,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,23,3.How does the greenhouse work?,24,The air inside was warm because the glass,traps(,挡住，吸收,),the heat from the sun and,keeps it from escaping,（逃跑）,.This makes the greenhouse,heat up,（热量上升）,and so the plants can grow,throughout(,在,期间,),the cold period.,25,greenhouse effect,26,27,What are the“greenhouse gases”?,What do you think greenhouse gases do?,28,Greenhouse Gases,Methane,4,Ozone,5,1,Carbon dioxide,2,Water vapor,1,1,Nitrous oxide,3,29,A greenhouse is made of glass and is used for growing plants throughout the cold weather.,The glass traps the heat from the sun and keeps it from escaping.,The atmosphere surrounds the earth and contain certain gases in it.The gases are called greenhouse gases which also trap the heat from the sun and keep the earth warm.,Greenhouse,Atmosphere,30,Glance quickly at the magazine article and answer the questions.,Reading,31,1.Who wrote the magazine article?What is the name of the magazine?,Sophie Armstrong.Earth Care.,2.What are the names of the three scientists,mentioned in the article?,Dr Janice Foster,Charles Keeling,George Hambley.,32,3.What do they think about global warming?Do,they agree with one another?,There are some very different attitudes among scientists towards this issue.,Some think the effects will be terrible,while,some others believe that we should not worry about it.,33,Graph I,shows the temperature increase of one degree Fahrenheit between,1860,to,2000.,4.What are,the two graphs,about?,34,Graph 2 shows the carbon dioxide content,in the atmosphere from 1957 to 1997.,35,5.What is,the main topic,of the,article?,Global warming/the warming of,the earth.,36,Part1,Part2,Part3,C.Introduction of global warming,(1),(2-5),(6),A.How global warming comes about,B.List two different attitudes towards global warming,Part4,(7),D.W,hether people should do something,about global warming,37,Read the passage carefully and judge whether the statements are true or false?,The temperature in the last century did not seem to increase much.,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.,F,T,T,38,4.The rise in carbon dioxide is causing a steady increase in global warming.,5.George Hambley believes that global warming will do good rather than harm to the earth.,6.It is clear what the effects of global warming will be.,T,T,F,39,1.Greenhouse gases refer to _.,A.carbon dioxide,B.the burning of fossil fuels,C.byproducts of the burning of,fossil fuels,D.coal,natural gas and oil,C,Scanning,40,2.Greenhouse effect _.,A.is a natural phenomenon,B.happens when theres too much carbon dioxide,C.does great harm to human beings,D.makes life for human beings better,A,41,3.Which of the following is TRUE according to the text?,A.The temperature of the earth increased about one degree Fahrenheit during the 20th century.,B.The carbon dioxide content in the air increased by 70 parts per million from 1957 to 1997.,C.All scientists accept the data in graph 2 except Charles Keeling.,D.Janice Foster says that more carbon dioxide will make plants grow faster.,A,42,4.Which of the following is Dr Janice Fosters opinion?,A.The result of the temperature increase will be serious.,B.The amount of warming is nothing serious.,C.We neednt worry about high levels of carbon dioxide.,D.Global warming is a natural phenomenon.,A,43,5._ found out the amount of carbon dioxide in the atmosphere from 1957 to1977.,A.Dr.Janice Foster,B.Charles Keeling,C.George Hambley,D.Sophie Armstrong,A,44,6.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,D,45,1.How has the global warming come about?,Human activity-burning of fossil fuels.,Greenhouse effect-greenhouse gases-we need those gases.,Huge quantities of extra carbon dioxide-from 1957 to 1997-from around 315 parts per million to around 370 parts per million.,46,2.What are the effects of global warming?,Encourage a greater range of animals.,The sea level to rise.,Severe storms,droughts,famines,the spread of diseases,and destruction of species.,Make plants grow faster.Crops will produce more.,47,The different ideas between Dr.Janice Foster&George Hambley,go up,catastrophe,very serious,positive,produce more,a greater range of animals,48,Summary,Skim over the passage,and tell what you have learnt in class.,eg:,I learnt that the earth is becoming warmer.,I learnt that global warming could have terrible effects on the environment.,.,49,Assignment,Read the passage again and review the new words and expressions.,Prepare the debate in groups.,Surf the Internet for more information about global warming.,Have a rest,50,