高中英语 unit4Warming up and Reading课件 新人教版选修6.ppt

人教课标高二选修6unit4 unit4globalwarming warmingup fromthefollowingpictures youwillknowwhereallthisenergycomesfrom windmills acoalpowerstation anoilrefinery anuclearpowerplant solarpanels hydro electricdam samplelists light heating coal non renewable oil non renewable television cassetteplayer videorecorder computer naturalgas non renewable wind windpower renewable sun solarenergy renewable uranium nuclearenergy non renewable fridge stove washingmachine hairdryer water hydro electric renewable plantwaste biomassenergy renewable hotspringsorgeysers geothermalenergy renewable thesea tidalenergy renewable renewableornon renewable renewableornon renewable whatistoldinthepicture whatisthegreenhousemadeandusedfor agreenhouseismadeofglassandisusedforgrowingplants especiallyduringcoldweather howdoesitwork theairinsideiswarmbecausetheglasstrapstheheatfromthesunandkeepsitfromescaping thismakesthegreenhouseheatupandsotheplantscangrowthroughoutthecoldperiod whatarethe greenhousegases intheatmospheresurroundingtheearththerearegasescalled greenhousegases includingcarbondioxide methane 甲烷 沼气 andwatervapor whatdoyouthinkgreenhousegasesdo theytraptheheatofthesunandkeeptheairsurroundingtheearthwarm paragraph1 introduceadebateovertheissueofglobalwarming raisingaquestion paragraphs2 3 illustratehowglobalwarmingcomesabout givingexamples usinggraphs explanation paragraphs4 5 listtwodifferentattitudesamongscientiststowardsglobalwarming givingexamples makingcontrast paragraph6 it suptoreaderstothinkanddecidewhetherpeopleshoulddosomethingaboutglobalwarmingornot usingaquestion leavingreaderstothinkovertheissue carefulreading readthetextcarefullyandfillintheblanks gases quantitiesof globaltemperature catastrophe highlevels consequences states positive ii choosethebestanswer 1 thefirstgraphinthetextisusedto attractreaders attentionb introducethetopicofglobalwarmingc actasanexampled supporttheopinionandmakeitmoreconvincing 2 theauthorprobablyagreesthat globalwarmingisgoodforusb wecandonothingaboutglobalwarmingc catastropheswillhappeniftheglobekeepsonwarmingd muchremainstobefoundoutabouttheeffectsofglobalwarming postreading answerthequestions whowrotethemagazinearticle whatisthenameofthemagazine sophiearmstrongwrotethemagazinearticle thenameofthemagazineisearthcare 2 whatarethenamesofthethreescientistsmentionedinthearticle theyaredr janicefoster charleskeelingandgeorgehambley 3 whatdotheythinkaboutglobalwarming dotheyagreewithoneanother therearesomeverydifferentattitudesamongscientiststowardsthisissue somethinktheeffectswillbeterrible whilesomeothersbelievethatweshouldnotworryaboutit graphishowsthetemperatureincreaseofonedegreefahrenheitbetween1860to2000 4 whatarethetwographsabout graph2showsthecarbondioxidecontentintheatmospherefrom1957to1997 5 whatisthemaintopicofthearticle globalwarming thewarmingoftheearth 1 thetemperatureinthelastcenturydidnotseemtoincreasemuch 2 everyonebelievesthatglobalwarmingiscausedbytheactivitiesofhumans 3 janicefosterbelievesthatshecanmeasurethefutureglobalriseintemperature 4 theriseincarbondioxideiscausingasteadyincreaseinglobalwarming 5 georgehambleybelievesthatglobalwarmingwilldogoodratherthanharmtotheearth 6 itisclearwhattheeffectsofglobalwarmingwillbe weshoulddonothingabouttheglobalwarming debateinstructions getintogroupsofsix decidewhichthreeinyourgrouparegoingtoagreewiththestatement groupa andwhichthreearegoingtodisagreewiththestatement groupb groupadiscusswhytheyagreewiththestatement groupbdiscusswhytheydisagree groupaandbgettogether telleachotherthereasonsforagreeingordisagreeingwiththestatement supplementarymaterialsfordebatingglobalwarming1 theplanethaswarmedanywherefrom0 5to1 0 c 1to2 f overthelastcentury thissmallamountmakesahugedifference causingglacierstomeltand potentially 潜在的 sealeveltorise wecouldseeevenmoreofthisinthefuture maybeanother3 c or5 f 2 adefinitionofglobalwarmingwouldhavetoincludeameasurable consistenttemperaturerise liketheonewehaveseeninrecenthistory aquestionremains isitanunusualchange muchdebateaboutthatone 3 theearthgetsonekindofenergy visiblelight fromthesunandgivesoffanotherkind infrared红外线 thiskindiswhatgetstrappedby greenhousegases ghg s intheatmosphere greenhousegases4 theglobalwarminggreenhouseeffectreallyisabogus 假的 term agreenhousekeepswarmbyphysicallytrappingtheairinsideandpreventingconvection 对流 theatmospherehelpskeeptheplanetwarmbytrappingoutgoingradiationinstead 5 theleadinggassesarecarbon dioxide methane ozone 臭氧 andnitrousoxide 一氧化二氮 gasanalyzersshowtheconcentrationsofthisstuffhaveincreasedsomewhatsincethebeginningoftheindustrialrevolution 6 thegreenhouseeffectraisestheaverage