人教版英语选修六Unit-4-Global-WarmingWarming-up-and-readi课件

1、Book6 Unit4 Global Warming Book6 Unit4 Global Warming ReadingThe Earth Is Becoming Warmer-But Does It Matter?ReadingThe Earth Is Becoming WTask: Skimming1. 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 a

2、rticle? A. The 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 Armstrong1 min0 minTask: Skimming1 min0 minParagraph 1Paragraphs 2-5Paragraph 6Part1Part2Part4Part3Paragraph 7Explain how global warm

3、ing comes about.List two different 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: SkimmingMain ideas1 min0 minParagraph 1Paragraphs 2-5Parag The passage

4、 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 warming human activities Fill in the blanksTask: Skimming The passage is mainFrom 1860 to 2000, the global temperature has ris

5、en about_ degree Fahrenheit.1 Cause?the burning of fossil fuelsWhat are some byproducts of this process called? Greenhouse gaseshuman activity:carbon dioxideTask: Scanning(Para3)From 1860 to 2000, the global 1. What is “greenhouse effect”?Greenhouse effect, a _ phenomenon, is when small amounts of g

6、ases _ heat from the sun and therefore _ the earth. naturaltrapwarm30sec0 secTask: 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

7、tends to be trapped causing the global temperature to go up. 2. Is “Greenhouse effect” or to us? (Para3)beneficial harmful 1 min0 minTask: ScanningWithout “greenhouse effect”, t315Between 1957and1997, the carbon dioxide content in the atmos-phere went up from around _ parts to around_parts per milli

8、on.315370 Charles KeelingWhich scientist?Task: Scanning(Para4)Increased by parts55 315Between 1957and1997,315370 3. Is “global warming” beneficial or harmful to us? (Para.6)Task: Scanning3. Is “global warming” beneficnegative(Dr. Janice Foster)positive(George Hambley)Carbon dioxide has caused the gl

9、obal 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 very seriouspositiveproduce a greater range of animals Two opposite attitudesTask: Scanning30sec0 sec(Para.6)negativepositiveC

10、arbon dioxideThe 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 Para61min0 minTask: ScanningThe good and bad effects of global warmingdisappearance of speciesThe bad effects of glo

11、bal warmThe 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 The good effects of global warGames12345Practice makes p

12、erfect!Games12345Practice makes perfe1. 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 carbon dioxide from 1957 to 1997? A. Charles Keeli

13、ng B. Dr. Janice Foster C. George Hambley D. Sophie Armstrong2. Who found out the amount of3. 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 of diseases. There may be the disapp

14、earance of species. All of the above. 3. What may be the bad effects4. 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 19

15、57 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.55includingGeorge Hambley4. Which of the following is 5. What does “It” refer to in “More carbon dioxide is actually a positive thing. It will ma

16、ke plants grow quicker” in Para6?Greenhouse gases B. Carbon dioxideC. Methane D. Water vapour5. 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 into consideration)

17、 Group work : DiscussionAfter-readingBad 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 memit(

18、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 w

19、e learnt, . Secondly, . Thirdly, . . In conclusion, in order to , I will/ wont buy a car. 4 min0 minemit(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 to what we learnt, global warming may cause a rise of sea level, severe storms, floods, the spread of d