人教版英语选修六Unit-4-Global-Warming(Warming-up-and-readi课件.ppt--（课件中不含音视频）

1、Book6 Unit4 Global Warming ReadingThe Earth Is Becoming Warmer-But Does It Matter?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 earth B.Global warming C.Greenhouse effect D.Carbon dioxide3.Who w

2、rote the article?A.Charles Keeling B.Janice Foster C.George Hambley D.Sophie ArmstrongParagraph 1Paragraphs 2-5Paragraph 6Part1Part2Part4Part3Paragraph 7Explain how global warming comes about.List two different attitudes among scientists towards global warming.Introduce the topic of global warming.I

3、ts up to readers to think and decide whether people should do something about global warming or not.Main ideas The passage is mainly about the .All scientists agree that it has been caused by .Some think it will benefit humans while others predict its a disaster.Main idea of the passageglobal warmin

4、g human activities Fill in the blanksFrom 1860 to 2000,the global temperature has risen about_ degree Fahrenheit.1 Cause?the burning of fossil fuelsWhat are some byproducts of this process called?Greenhouse gaseshuman activity:carbon dioxide(Para3)1.What is“greenhouse effect”?Greenhouse effect,a _ p

5、henomenon,is when small amounts of gases _ heat from the sun and therefore _ the earth.naturaltrapwarm(Para3)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 cau

6、sing the global temperature to go up.2.Is“Greenhouse effect”or to us?(Para3)beneficial harmful 315Between 1957and1997,the carbon dioxide content in the atmos-phere went up from around _ parts to around_parts per million.315370 Charles KeelingWhich scientist?(Para4)Increased by parts55 3.Is“global wa

7、rming”beneficial or harmful to us?(Para.6)negative(Dr.Janice Foster)positive(George Hambley)Carbon dioxide has caused the global temperature to _.An increase of 5 degrees would lead to a _and could be_.More carbon dioxide is a _ thing,which makes crops _ more and will encourage_.go upcatastrophe ver

8、y seriouspositiveproduce a greater range of animals Two opposite attitudes(Para.6)The bad effects of global warmingThere may be:1.a rise of sea level 2.severe storms,floods,droughts,famines 3.the spread of diseases 4.the disappearance of species Para6The good and bad effects of global warmingdisappe

9、arance of speciesThe good effects of global warmingmake life better1.make plants grow quicker2.crops will produce more 3.encourage a greater range of animals make plants grow quicker crops will produce morea greater range of animals make life better 12345Practice makes perfect!1.Greenhouse gases ref

10、er to _.A.carbon dioxide B.the burning of fossil fuelsC.byproducts of the burning of fossil fuelsD.coal,natural gas and oil 2.Who found out the amount of carbon dioxide from 1957 to 1997?A.Charles Keeling B.Dr.Janice Foster C.George Hambley D.Sophie Armstrong3.What may be the bad effects of global w

11、arming?A.There may be a rise of several metres in the sea level.B.There may be severe storms,floods,droughts,famines or the spread of diseases.C.There may be the disappearance of species.D.All of the above.4.Which of the following is TRUE according to the text?A.The temperature of the earth increase

12、d 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.55includingG

13、eorge Hambley5.What does“It”refer to in“More carbon dioxide is actually a positive thing.It will make plants grow quicker”in Para6?A.Greenhouse gases B.Carbon dioxideC.Methane D.Water vapour Private cars are getting more and more popular.If you can afford a car one day,will you think of buying one?P

14、lease give your reasons.(Take global warming into consideration)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 emit(排放排放);car

15、exhausts(尾气尾气);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,.Secondly,.Th

16、irdly,.In conclusion,in order to ,I will/wont buy a car.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 to what we learnt,global warming may cause a rise of se

17、a 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 energy.In conclusion,in order to protect the earth and ourselves well,I wont buy a car.What have you learnt this period?Global warmingEffects Causes1.Read the passage carefully to find out some useful expressions and structures.2.Preview Using Language-WHAT CAN WE DO ABOUT GLOBAL WARMING?