选修六 4.5Unit 4　Reading.ppt

新课标人教版课件系列 高中英语 选修 模块 6 4 5 reading whatisthegreenhousemadeandusedfor agreenhouseismadeofglassandisusedforgrowingplants especiallyduringcoldweather howdoesitwork theairinsideiswarmbecausetheglasstrapstheheatfromthesunandkeepsitfromescaping thismakesthegreenhouseheatupandsotheplantscangrowthroughoutthecoldperiod whatarethe greenhousegases intheatmospheresurroundingtheearththerearegases whicharecalled greenhousegases includingcarbondioxide methane 甲烷 沼气 andwatervapor whatdoyouthinkgreenhousegasesdo theytrapheatfromthesunandthereforewarmtheearth paragraph1 introduceadebateovertheissueofglobalwarming raisingaquestion paragraphs2 4 illustratehowglobalwarmingcomesabout givingexamples usinggraphs explanation paragraphs5 10 listtwodifferentattitudesamongscientiststowardsglobalwarming givingexamples makingcontrast paragraph11 it suptoreaderstothinkanddecidewhetherpeopleshoulddosomethingaboutglobalwarmingornot usingaquestion leavingreaderstothinkovertheissue 浓度单位 glancequicklyatthemagazinearticleandanswerthequestions whowrotethemagazinearticle whatisthenameofthemagazine sophiearmstrongwrotethemagazinearticle thenameofthemagazineisearthcare whatarethenamesofthethreescientistsmentionedinthearticle theyaredr janicefoster charleskeelingandgeorgehambley 3 whatdotheythinkaboutglobalwarming dotheyagreewithoneanother theydon tagreewitheachother dr janicefosterthinkstheeffectsofglobalwarmingcouldbeveryserious georgehambleythinksglobalwarmingwillbemildwithfewbadenvironmentalconsequences charleskeelingbelievesitistheburningofmoreandmorefossilfuelsthatisresultinginabigincreaseincarbondioxide whatarethetwographsabout graphishowsthetemperatureincreaseofonedegreefahrenheitbetween1860to2000 graph2isaboutthecarbondioxidecontentintheatmosphere 1958 1990 whatisthemaintopicofthearticle globalwarming thewarmingoftheearth 2 true 3 5 6 7 8false 1 2 4 9 10correctsentences 1 thetemperaturelastcenturyincreasedmuch 2 noteveryonebelievesthatglobalwarmingiscausedbyhumanactivities 4 naturalgasisnotagreenhousegasbutafossilfuel 9 georgehambleythinksthatmorecarbondioxideisapositivethinganditwillmakeplantsgrowfaster 10 itisunknownwhattheeffectsofglobalwarmingwillbe debateinstructions getintogroupsofsix decidewhichthreeinyourgrouparegoingtoagreewiththestatement groupa andwhichthreearegoingtodisagreewiththestatement groupb groupadiscusswhytheyagreewiththestatement groupbdiscusswhytheydisagree groupaandbgettogether telleachotherthereasonswhyagreeordisagreewiththestatement supplementarymaterialsfordebatingglobalwarming1 theplanethaswarmedanywherefrom0 5to1 0 c 1to2 f overthelastcentury thissmallamountmakesahugedifference causingglacierstomeltand potentially 潜在的 sealeveltorise wecouldseeevenmoreofthisinthefuture maybeanother3 c or5 f globalwarming globalwarming 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 thegreenhouseeffectraisestheaveragetemperatureoftheearthbymorethan30degrees sowithoutittheearthwouldbeaverycoldplace greenhouseeffect greenhouseeffect greenhousefeelinghelplesstodoanythingaboutglobalwarming findouthowonefamilycuttheirownpersonalgreenhouse gasemiss