1、Words studyGlobal warmingUnit 4 readingPre-readingWhat is the greenhouse made and used for?trap the heat from the sunkeep it from escapingwarmgreenhouseHow does it work?GreenhouseGreenhouse EffectGreenhouse gasesSkim the article:What are the names of the three scientists mentioned in the article?Who
2、 wrote the article?What is the name of the magazine?Tip:In English,some nouns begin with a capital letter,such as names of people and places,titles of magazines,newspapers,stories and books,peoples titles,etc.Fast Reading Lets check it:Who wrote the article?What is the name of the magazine?What are
3、the names of the 3 scientists?A.Expositive (说明文说明文)B.Practical(应用文）应用文）C.Argumentative(议论文议论文）D.Narrative（记叙文）（记叙文）The organization of an expositive essay:IntroductionA titleBodyConclusionPara.1Para.2-6Para.7Look through:Para.1Para.2-3Para.4-6Para.7 Match the parts with the main ideas:Part Part 2Par
4、t 4Part 3 Match the parts with the writing skills:Part 1Part 4Part 3Part 2Read the 2 graphs:Detailed readingThe 1st graph shows the global t between 1860 and .The temperature i and decreased over this period but on the whole it i by around one degree Fahrenheit.During this time,the earth reached its
5、 l temperature in about 1910 and its highest in .There was a steady increase in the temperature during the 20 years after 1980.We can see from the graph that the earth has become w since early last century.Detailed readingRead something more about the 2 graphs:The 2nd graph shows the amount of c d i
6、n the atmosphere from to 1997.The Co2 c steadily i over this forty-year period.It went up from 315 to parts p million.Tip:While reading a graph,youd better pay attention to the numbers.Detailed reading Detailed readingAre these statements true or false?Do the exercise on page 27What do the 3 scienti
7、sts think about global warming?Do they agree with one another?Read the article carefully.Detailed readingRead the text carefully and fill in the blanks.Scientists OpinionJanice Foster We need 1_ like carbon dioxide,methane and water vapour,but if we add huge 2_ extra carbon dioxide to the atmosphere
8、 by burning fossil fuels,it will cause the 3_ to go up.gasesquantities ofglobal temperatureScientists OpinionJanice Foster Over the next 100 years the amount of warming could be as low as 1 to 1.5 degrees Celsius,but it could be as high as 5 degrees Celsius.An increase of five degrees would be a 4_.
9、catastropheScientists OpinionsGeorge Hambley Believes that we shouldnt worry about 5_ of carbon dioxide in the air.Predicts that any warming will be mild with few bad environmental 6_.7_ that more carbon dioxide is actually a 8_ thing,which will make life for human beings better.high levels conseque
10、ncesStatespositiveMaybe The sea level will riseMaybeThere will be more disasters,such asflood!Famine!forest fire!What should our government do to slow down global warming?1.Give money to green the surroundings and protect the forests.2.Encourage people to find and use more renewable energy.rare plantsrare animals3.Make laws4.mediaLets join hands to protect our home.One world,one dream!Talk about the effects of global warming.Think about what individuals should do.Call on people to protect the earth and design a slogan(口口号）号）.Everyone can make a differenceThank you very much
