高中英語 Unit 4 Global warming Reading 1課件 新人教版選修6.ppt

unit4globalwarming reading whatisthegreenhousemadeandusedfor agreenhouseismadeofglassandisusedforgrowingplants especiallyduringcoldweather howdoesitwork theairinsideiswarmbecausetheglasstrapstheheatfromthesunandkeepsitfromescaping thismakesthegreenhouseheatupandsotheplantscangrowthroughoutthecoldperiod whatarethe greenhousegases intheatmospheresurroundingtheearththerearegases whicharecalled greenhousegases includingcarbondioxide methane 甲烷 沼氣 andwatervapor whatdoyouthinkgreenhousegasesdo theytrapheatfromthesunandthereforewarmtheearth paragraph1 introduceadebateovertheissueofglobalwarming raisingaquestion skimming paragraphs2 3 illustratehowglobalwarmingcomesabout givingexamples usinggraphs explanation paragraphs4 5 listtwodifferentattitudesamongscientiststowardsglobalwarming givingexamples makingcontrast paragraph6 it suptoreaderstothinkanddecidewhetherpeopleshoulddosomethingaboutglobalwarmingornot usingaquestion leavingreaderstothinkovertheissue readthetextcarefullyandfillintheblanks gases quantitiesof globaltemperature catastrophe highlevels consequences states positive choosethebestanswersaccordingtothetext 1 whichofthefollowingistrueaccordingtothetext a thetemperatureoftheearthincreasedaboutonedegreefahrenheitduringthe20thcentury b thecarbondioxidecontentintheairincreasedby70partspermillionfrom1957to1997 c allscientistsacceptthedataingraph2exceptcharleskeeling d janicefostersaysthatmorecarbondioxidewillmakeplantsgrowfaster a 2 whichofthefollowingisdrjanicefoster sopinion a theresultofthetemperatureincreasewillbeserious b theamountofwarmingisnothingserious c weneedn tworryabouthighlevelsofcarbondioxide d globalwarmingisanaturalphenomenon a 濃度單位 answerthequestions whowrotethemagazinearticle whatisthenameofthemagazine sophiearmstrongwrotethemagazinearticle thenameofthemagazineisearthcare postreading 2 whatarethenamesofthethreescientistsmentionedinthearticle theyaredr janicefoster charleskeelingandgeorgehambley 3 whatdotheythinkaboutglobalwarming dotheyagreewithoneanother theydon tagreewitheachother dr janicefosterthinkstheeffectsofglobalwarmingcouldbeveryserious georgehambleythinksglobalwarmingwillbemildwithfewbadenvironmentalconsequences charleskeelingbelievesitistheburningofmoreandmorefossilfuelsthatisresultinginabigincreaseincarbondioxide 4 whatarethetwographsabout graphishowsthetemperatureincreaseofonedegreefahrenheitbetween1860to2000 graph2isaboutthecarbondioxidecontentintheatmosphere 1958 1990 5 whatisthemaintopicofthearticle globalwarming thewarmingoftheearth 2 checkthestatementsonpage27true 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 潛在的 sealeveltorise wecouldseeevenmoreofthisinthefuture maybeanother3 c or5 f globalwarming globalwarming 2 adefinitionofglobalwarmingwouldhavetoincludeameasurable consistenttemperaturerise liketheonewehaveseeninrecenthistory aquestionremains isitanunusualchange muchdebateaboutthatone 3 theearthgetsonekindofenergy visiblelight fromthesunandgivesoffanotherkind infrared紅外線 thiskindiswhatgetstrappedby greenhousegases ghg s intheatmosphere greenhousegases4 theglobalwarminggreenhouseeffectreallyisabogus 假的 term agreenhousekeepswarmbyphysicallytrappingtheairinsideandpreventingconvection 對(duì)流 theatmospherehelpskeeptheplanetwarmbytrappingoutgoingradiationinstead 5 theleadinggassesarecarbon dioxide methane ozone 臭氧 andnitrousoxide 一氧化二氮 gasanalyzersshowtheconcentrationsofthisstuffhaveincreasedsomewhatsincethebeginningoftheindustrialrevolution 6 thegreenhouseeffectraisestheaveragetemperatureoftheearthbymorethan30degrees sowithoutittheearthwouldbeaverycoldplace greenhouseeffect greenhouseeffect greenhousefeelinghelplesstodoanythingaboutglobalwarming findouthowonefamilycu