高中英语_Global-warming教学ppt课件设计.ppt

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1、Unit 4ReadingThe earth is becoming warmer,but does it matter?Learning Aims1.To learn some important words and phrases about global warming.2.To develop the reading skills by skimming and scanning the passage.3.To strengthen the awareness of environment protection.Pre-reading1.Whats the main topic of

2、 the passage?The main topic of the passage is about .2.Who wrote the magazine article?What is the name of the magazine?wrote the magazine article;the name of the magazine is .3.What are the names of the three scientists mentioned in the article?The names of the three scientists mentioned in the arti

3、cle are ,and .Do they agree with one another?global warmingSophie ArmstrongEarth CareDr Janice Foster Charles Keeling George Hambley No,they dont.Part1Part2Part3C.Introduction of global warming(1)(2-5)(6)A.How global warming comes about B.List two different attitudes towards global warmingPart4(7)D.

4、Whether people should do something about global warming Step 1 Fast reading1.How much did the temperature rise in the 1900s?A.One degree Fahrenheit.B.One Celsius.C.Two degrees.D.Thirty degrees Celsius.2.What causes the earths temperature increasing?A.Cutting trees B.Wasting the farmland.C.Running ou

5、t of the river water D.Burning fossil fuels.3.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.4.Accor

6、ding to George Hambley,.A.Global warming is a serious problem.B.There is no need to worry about global warming.C.The levels of CO2 in the air will become lower in the future.D.More animals will make greenhouse gases decrease.5.We can infer from the text that _.A.the debate about the effects of globa

7、l warming has not been settled.B.the greenhouse effect is the result of peoples actions.C.all scientists think it is important to reduce the amount of CO2 in the atmosphere.D.reducing greenhouse gases will immediately decrease the earths temperature.Step 2 Careful reading(Para.2-Para.3)The reasons f

8、or global warming .human activity the burning of fossil fuels greenhouse gases carbon dioxide methane water vapour(Para.4-Para.5)The levels of carbon dioxide have increased greatly over the last .According to Dr.Charles Keeling,from to ,the amount in the atmosphere went up from around parts to aroun

9、d parts per million Dr.Janice Foster believes over the next century,the amount of warming could be as low as degrees Celsius,but it could also be as high as degrees.100 to 150 years 1957 1997 315 370 1 to 1.5 5Part3(6-7)a rise in the see levelsevere stormsdroughtsfloodsoptimisticIt will cause:pessim

10、isticIt is a _ thing,which makes plants grow _;crops will produce _;it will encourage a greater range of _ all of which will make life _.positivequickermoreanimalsbetterDr.Janice FosterGeorge Hambley Step 3 Further reading（）1.The temperature in the last century seemed to increase much.（）2.Everyone b

11、elieves that global warming is caused by the activities of humans.（）3.The rise in carbon dioxide is causing a steady increase in global warming.（）4.George Hambley believes that global warming will do good rather harm to the earth.（）5.It is clear what the effects of global warming will be.F T T T F S

12、tep4 RetellingThe temperature of the earth1 (rise)about one degree during the 20th century.How has this come 2?All scientists subscribe 3 the view that it is human activity 4 has caused the 5 (globe)warming rather 6 a random but natural phenomenon.Some scientists think we add large 7 (quantity)of ca

13、rbon dioxide to the air.Some scientists believe the burning of more and more fossil fuels 8 (have)resulted in the increase of carbon dioxide.Greenhouse gases continue to build 9 .It may be a catastrophe but George 10 (state)that it is a positive thing.rose about to that global than quantities has up

14、 states Step5 Free talk -A speechPart3(6-7)Opinion1:We shall do something about global warming.Opinion2:We shall do nothing about global warming.Free talkBoys and girls,It is a great honor for me to give the speech about global warming.All our group members are in favor of Opinion 1 because .Opinion

15、 2 because.So it is time for us to take some actions such as.So there is no need to worry too much about global warming.OK.So much for my speech and thanks for your listening.Words studyThe green world will return to us!Summary1.Retell the passage fluently in your own words2.Write a short passage titled What should we do to prevent global warmingHomework