选修6-unit4-Global-Warming课件

Unit4GlobalWarming孙广勇造成极端天气频繁的一个重要原因就是全球变暖。1.Readthetextcarefullyandsumupthemainideaofeachpart.2.Readthetextfastandanswerthequestionsonpage27Ex1Partone:(para1)Introduceatopic/raiseaquestionParttwo:(para2-5)Explainhowglobalwarmingcomesabout.Partthree:(para6)ListtwodifferentattitudesPartfour:(para7)Drawaconclusion.Theearthisbecomingwarmer.Shouldwedoanything?FastReadingReadthetextfastandanswerthequestionsonpage27Ex11.Whowrotethemagazinearticle?Whatisthenameofthemagazine?SophieArmstrongwrotethemagazinearticle.ThenameofthemagazineisEarthCare.2.Whatarethenamesofthethreescientistsmentionedinthearticle?TheyareDr.JaniceFoster,CharlesKeelingandGeorgeHambley.3.Whatdotheythinkaboutglobalwarming?Dotheyagreewithoneanother?Theydon'tagreewitheachother.Dr.JaniceFosterthinkstheeffectsofglobalwarmingcouldbeveryserious.GeorgeHambleythinksglobalwarmingwillbemildwithfewbadenvironmentalconsequences.4.Whatarethetwographsabout?Graph1showsthetemperatureincreaseofonedegreeFahrenheitbetween1860to2000.Graph2showsthecarbondioxidecontentintheatmospherefrom1957to1997.Graph1:Graph2:5.Whatisthemaintopicofthearticle?GlobalwarmingPage27Ex.2TorF1.Thetemperatureinthelastcenturydidn’tseemtoincreasemuch.2.Everyonebelievesthatglobalwarmingiscausedbytheactivitiesofhumans.3.JaniceFosterbelievesthatshecanmeasurethefutureglobalriseintemperatrue4.Theriseincarbondioxideiscausingasteadyincreaseinglobalwarming.5.GeorgeHambleybelievesscientistsarejustguessingabouttheeffectsofglobalwarming.6.Itisclearwhattheeffectsofglobalwarmingwillbe.TTTTFF1.Thetemperatureinthelastcenturydidn’tseemtoincreasemuch.2.Everyonebelievesthatglobalwarmingiscausedbytheactivitiesofhumans.3.JaniceFosterbelievesthatshecanmeasurethefutureglobalriseintemperatrueTTFLine2:…itisarapidincreasecomparedtomostnaturalchanges…Line5:Thereisdoubtthat…4.Theriseincarbondioxideiscausingasteadyincreaseinglobalwarming.5.GeorgeHambleybelievesscientistsarejustguessingabouttheeffectsofglobalwarming.TT6.Itisclearwhattheeffectsofglobalwarmingwillbe.Line45:Nooneknows…SummaryTheearthisbecomingwarmingandallscientists_____________theviewthattheincreaseintheearth’stemperatureisduetotheburningof_____________.Some__________ofthisprocessarecalled________________,themostimportantoneofwhichis__________________.Weneedthesegases,buttheproblembeginswhenweaddhuge_______________extracarbondioxideintotheatmosphere.Itmeansthatmoreheatenergy________tobetrappedintheatmospherecausingtheglobaltemperatureto___________.AscientistcalledCharlesKeelingfoundthatthecarbondioxideintheatmospherewentupfromaroundsubscribetofuelsgreenhousegasesbyproductscarbondioxidequantitiesoftendsgoupfossil315partstoaround370parts________millionin40years.Allscientistsacceptthedateandagreetheburningofmoreandmorefossilfuelshas_____________thisincrease.However,theattitudeofscientiststowardsthisriseiscompletelydifferent.Ontheonehand,Dr.Fosterthinksthatthe__________whichincreasesthetemperatureby5degreeswouldbea_____________.Ontheotherhand,GeorgeHambley,who_________________thisview,believethatweshouldnotworryabouthighlevelsofcarbondioxideintheair.Theypredictthatanywarmingwillbe________withfewbadenvironmental_____________.Butnoonereallyknowstheeffectsofglobalwarming.perresultedintrendcatastropheareopposedtomildconsequencesWhatweshoulddotoprotectourearth?Discussion:It’shightimethatwetookimmediatemeasurestoprotectourearthfrombeingpolluted.Tobeginwith,weshouldnotthrowanyrubbishhereandthere.Instead,weshouldpickitup.Besides,wearesupposedtobantheabuseofplasticbags.Plasticbagscanmakewhitepollution,whichmakestheenvironmentworseandworse.What’smore,weshouldstopfactoriesfromproducingharmfulgasesandwater.Thenweappealtootherstotakeabusorbiketogotoschoolorworksoastoreduceusingprivatecarswhichcauseairpollution.Finally,itisgoodforustocareaboutplants.Themoreplantswehave,thebettertheenvironmentwillbecome.Tobeginwith,weshouldnotthrowanyrubbishhereandthere.Instead,weshouldpickitup.Besides,wearesupposedtobantheabuseofplasticbags.Plasticbagscanmakewhitepollution,whichmakestheenvironmentworseandworse.What’smore,weshouldstopfactoriesfromproducingharmfulgasesandwater.Thenweappealtootherstotakeabusorbiketogotoschoolorworksoastoreduceusingprivatecarswhichcauseairpollution.Finally,itisgoodforustocareaboutplants.Themoreplantswehave,thebettertheenvironmentwillbecome.Let’sprotectourenvironmenttogether!LOGO