the-earth-is-becoming-warmer选修6-第4单元.ppt

greenhouse,effectgases,globalwarming,TheEarthIsBecomingWarmer,-ButDoesItMatter?,TheEarthIsBecomingWarmer,Tellthefactaboutglobalwarming,-ButDoesItMatter?,comparedifferentideas,Predict,Readtheopeningparagraph,1.Whowrotethearticle?,2.Whatisthenameofthemagazine?,Skimming,3.Whatisthetopicsentenceofthetext?,Sohowhasthiscomeaboutanddoesitmatter?,Theprocessofhowglobalwarmingdevelopsandpeoplesdifferentattitudesaredeclaredinthetext.,1.Para2-4howhasthiscomeabout,Carefulreading,1.WhatisGraph1about?,Thelargerthetemperaturedifference,themoreheatistransferred.,conclusion:theearthisbecomingwarmer,randomphenomenon,naturalphenomenon,Carefulreading,2.reason?,theburningoffossilfuels,byproduct,greenhousegases,carbondioxide,Para3,Carefulreading,3.greenhouseeffect?,Para3,Carefulreading,4.Whatstheproblem?,hugequantitiesofextracarbondioxidemoreheatenergytendstobetrappedtheglobaltemperaturetogoup,Para3,Carefulreading,1.WhatisGraph2about?,Conclusion:thelevelsofCO2haveincreasedgreatly,resultin,theburningoffossilefuels,overthenext100years,aslowas1to1.5degreeCelsius,ashighas5degreeCelsius,2.Para2-4howhasthiscomeabout,differentattitudes,Carefulreading,DrJaniceFoster,GeorgeHambley,The_thatthetemperatureincreasesbyfivedegreeswouldbea_anditcouldbevery_.,trend,serious,catastrophe,Anywarmingwillbe_withfewbad_.Itisactuallya_thing.,mild,environmental,positive,consequences,Carefulreading,catastrophe,ariseofseveralmetersinthesealevel,severestorms,floods,faminesthespreadofdiseasesdisappearanceofspecies,Carefulreading,positive,encourageagreaterrangeofanimals,makeplantsgrowquickermakecropsproducemore,Carefulreading,greenhousegasesbuildup,Evenifwestart.,theclimateisgoingtokeeponwarming.,Para6,书本27页练习2,Title_,Theopeningpara.:raisingaquestion,graph2,Para2,3:_,Para4,5_,Para6:conclusion,graph1,Theearthisbecomingwarmer,-Butdoesitmatter?,causes,Givingexamples,usinggraphs,explanation.,differentattitudes,Discussion,Weshouldstartfromeverylittlebittofightagainstglobalwarming.Whatcanwedo?,walk