人教版英语选修六Unit4GlobalWarming(Warmingupandreadi课件.ppt

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1、,Book6 Unit4 Global Warming,Book6 Unit4 Global Warming,The Earth Is Becoming Warmer-But Does It Matter?,ReadingThe Earth Is Becoming W,Task:Skimming,1.Where is the passage most probably taken from?A.An environmental magazine B.A diary C.A novel.D.A story 2.What is the main topic of the article?A.The

2、 earth B.Global warming C.Greenhouse effect D.Carbon dioxide3.Who wrote the article?A.Charles Keeling B.Janice Foster C.George Hambley D.Sophie Armstrong,1 min,0 min,Task:Skimming1 min0 min,Paragraph 1,Paragraphs 2-5,Paragraph 6,Paragraph 7,Explain how global warming comes about.,List two different

3、attitudes among scientists towards global warming.,Introduce the topic of global warming.,Its up to readers to think and decide whether people should do something about global warming or not.,Task:Skimming,Main ideas,1 min,0 min,Paragraph 1Paragraphs 2-5Parag,The passage is mainly about the.All scie

4、ntists agree that it has been caused by.Some think it will benefit humans while others predict its a disaster.,Main idea of the passage,global warming,human activities,Fill in the blanks,Task:Skimming,The passage is main,From 1860 to 2000,the global temperature has risen about_ degree Fahrenheit.,1,

5、Cause?,the burning of fossil fuels,What are some byproducts of this process called?,Greenhouse gases,human activity,:carbon dioxide,Task:Scanning,(Para3),From 1860 to 2000,the global,1.What is“greenhouse effect”?,Greenhouse effect,a _ phenomenon,is when small amounts of gases _ heat from the sun and

6、 therefore _ the earth.,natural,trap,warm,30sec,0 sec,Task:Scanning,(Para3),1.What is“greenhouse effect”,Without“greenhouse effect”,the earth would be much cooler than it is.,Beneficial:,Harmful:,With huge quantities of extra carbon dioxide in the atmosphere,more heat energy tends to be trapped caus

7、ing the global temperature to go up.,2.Is“Greenhouse effect”or to us?(Para3),beneficial,harmful,1 min,0 min,Task:Scanning,Without“greenhouse effect”,t,315,Between 1957and1997,the carbon dioxide content in the atmos-phere went up from around _ parts to around_parts per million.,315,370,Charles Keelin

8、g,Which scientist?,Task:Scanning,(Para4),Increased by parts,55,315Between 1957and1997,315370,3.Is“global warming”beneficial or harmful to us?,(Para.6),Task:Scanning,3.Is“global warming”benefic,go up,catastrophe,very serious,positive,produce,a greater range of animals,Two opposite attitudes,Task:Scan

9、ning,30sec,0 sec,(Para.6),negativepositiveCarbon dioxide,The bad effects of global warming,There may be:1.a rise of sea level,2.severe storms,floods,droughts,famines,3.the spread of diseases,4.the disappearance of species,Para6,1min,0 min,Task:Scanning,The good and bad effects of global warming,disa

10、ppearance of species,The bad effects of global warm,The good effects of global warming,make life better,1.make plants grow quicker,2.crops will produce more,3.encourage a greater range of animals,make plants grow quicker,crops will produce more,a greater range of animals,make life better,The good ef

11、fects of global war,Games,1,2,3,4,5,Practice makes perfect!,Games12345Practice makes perfe,1.Greenhouse gases refer to _.A.carbon dioxide B.the burning of fossil fuelsC.byproducts of the burning of fossil fuelsD.coal,natural gas and oil,1.Greenhouse gases refer to _,2.Who found out the amount of car

12、bon dioxide from 1957 to 1997?A.Charles Keeling B.Dr.Janice Foster C.George Hambley D.Sophie Armstrong,2.Who found out the amount of,3.What may be the bad effects of global warming?There may be a rise of several metres in the sea level.There may be severe storms,floods,droughts,famines or the spread

13、 of diseases.There may be the disappearance of species.All of the above.,3.What may be the bad effects,4.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

14、 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.,55,including,George Hambley,4.Which of the following is,5.What does“It”refer to in“More carbon dioxide is actually

15、 a positive thing.It will make plants grow quicker”in Para6?Greenhouse gases B.Carbon dioxideC.Methane D.Water vapour,5.What does“It”refer to in,Private cars are getting more and more popular.If you can afford a car one day,will you think of buying one?Please give your reasons.(Take global warming i

16、nto consideration),Group work:Discussion,After-reading,Bad effects:a rise of sea level;severe storms,floods,droughts,famines;the spread of diseases;the disappearance of species.Good effects:make plants grow quicker;crops will produce more;encourage a greater range of animals,Private cars are getting

17、 m,emit(排放);car exhausts(尾气);carbon dioxide;global warming;air pollution;traffic jams;traffic accidents;waste energy;convenient;economic development,In my opinion/As far as I am concerned,if I can afford a car one day,I will/wont buy a car.My reasons are as follows.First,.According to what we learnt

18、,.Secondly,.Thirdly,.In conclusion,in order to,I will/wont buy a car.,4 min,0 min,emit(排放);car exhausts(尾气);ca,As far as I am concerned,if I can afford a car one day,I wont buy a car.My reasons can be listed as follows.First,cars exhausts contain carbon dioxide which causes global warming.According

19、to what we learnt,global warming may cause a rise of sea level,severe storms,floods,the spread of diseases and the disappearance of species.Secondly,too much cars cause heavy traffic jams at rush hours.Thirdly,car accidents kill many people every year.Last but not least,cars wastes a great deal of e

20、nergy.In conclusion,in order to protect the earth and ourselves well,I wont buy a car.,As far as I am concerned,What have you learnt this period?,What have you learnt this peri,Summary,Global warming,Effects,Causes,SummaryGlobal Effects Causes,Homework,1.Read the passage carefully to find out some useful expressions and structures.2.Preview Using Language-WHAT CAN WE DO ABOUT GLOBAL WARMING?,Homework1.Read the pas,Thank You!,Thank You!,