高二英语人教版选修6课件：unit 4 reading .ppt

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1、人教课标高二选修6Unit4Unit4GlobalwarmingWarmingupFromthefollowingpictures,youwillknowwhereallthisenergycomesfrom.windmillsacoalpowerstationanoilrefineryanuclearpowerplantsolarpanelshydro-electricdamSamplelistsThingsthatuseenergySourcesofenergyRenewable/non-renewablelightheatingcoalnon-renewableoilnon-renewa

2、bletelevisioncassetteplayervideorecordercomputernaturalgasnon-renewablewind(windpower)renewablesun(solarenergy)renewableuranium(nuclearenergy)non-renewablefridgestovewashingmachinehairdryerwater(hydro-electric)renewableplantwaste(biomassenergy)renewablehotspringsorgeysers(geothermalenergy)renewablet

3、hesea(tidalenergy)renewableRenewableornon-renewable?Renewableornon-renewable?Whatistoldinthepicture?Whatisthegreenhousemadeandusedfor?Agreenhouseismadeofglassandisusedforgrowingplants,especiallyduringcoldweather.Howdoesitwork?Theairinsideiswarmbecausetheglasstrapstheheatfromthesunandkeepsitfromescap

4、ing.Thismakesthegreenhouseheatupandsotheplantscangrowthroughoutthecoldperiod.Whatarethe“greenhousegases”?Intheatmospheresurroundingtheearththerearegasescalled“greenhousegases”,includingcarbondioxide,methane(甲烷,沼气)andwatervapor.Whatdoyouthinkgreenhousegasesdo?Theytraptheheatofthesunandkeeptheairsurro

5、undingtheearthwarm.MainideasofeachpartWritingtechniques(Paragraph1)Introduceadebateovertheissueofglobalwarming.RaisingaquestionMainideasofeachpartWritingtechniques(Paragraphs2–3)Illustratehowglobalwarmingcomesabout.Givingexamples,usinggraphs,explanation.(Paragraphs4–5)Listtwodifferentattitudesamongs

6、cientiststowardsglobalwarming.Givingexamples,makingcontrast.(Paragraph6)It’suptoreaderstothinkanddecidewhetherpeopleshoulddosomethingaboutglobalwarmingornot.Usingaquestion,leavingreaderstothinkovertheissue.CarefulreadingReadthetextcarefullyandfillintheblanks.ScientistsOpinionJaniceFoster◆Weneed_____

7、_likecarbondioxide,methaneandwatervapour,butifweaddhuge___________extracarbondioxidetotheatmospherebyburningfossilfuels,itwillcausethe________________togoup.gasesquantitiesofglobaltemperatureScientist