人教版 选修六 Unit 4 Global warmingreading课件（共32张PPT）.ppt

wordsstudy unit4globalwarming listthingsthatuseenergyaroundusoratanyotherplaces inahouse lightstelevisioncassetteplayer walkmancomputerfridgestovewashingmachinehairdryervideorecorder windmills acoalpowerstation 2 wheredoesalltheenergycomefrom powerstation anoilrefinery anuclearpowerplant solarpanels hydro electricdam coaloilnaturalgaswind power sun solarenergy water hydro electricpower thesea tidalenergy uranium nuclearenergy plantwaste biomassenergy energysources coaloilnaturalgasuranium wind windpower sun solarenergy water hydro electricpower plantwaste biomassenergy hotspringsorgeysers geothermalenergy thesea tidalenergy fossilfuels non renewable renewable runout neverrunout whatarefossilfuels ancientanimalandplantmaterialbelowthesurfaceoftheearthwithahighcarboncontent suchascoal oilandnaturalgas whichcanbeburnttoproduceenergy alsoknownasnon renewableenergybecauseoncetheyareusedtheyhavegoneforever theycannotberenewed whatisagreenhousemadeandusedfor agreenhouseismadeofglassandisusedforgrowingplants especiallyduringcoldweather howdoesitwork theairinsideiswarmbecausetheglasstrapstheheatfromthesunandkeepsitfromescaping thismakesthegreenhouseheatupandsotheplantscangrowthroughoutthecoldperiod whatarethe greenhousegases intheatmospheresurroundingtheearththerearegases whicharecalled greenhousegases includingcarbondioxide methane 甲烷 沼气 andwatervapor whatdoyouthinkgreenhousegasesdo theytrapheatfromthesunandthereforewarmtheearth glancequicklyatthemagazinearticleandanswerthequestions whowrotethemagazinearticle whatisthenameofthemagazine sophiearmstrongwrotethemagazinearticle thenameofthemagazineisearthcare whatarethenamesofthethreescientistsmentionedinthearticle theyaredr janicefoster charleskeelingandgeorgehambley 3 whatdotheythinkaboutglobalwarming dotheyagreewithoneanother theydon tagreewitheachother dr janicefoster serious georgehambley mildwithfewbadenvironmentalconsequences charleskeeling itistheburningofmoreandmorefossilfuelsthatisresultinginabigincreaseincarbondioxide whatarethetwographsabout graphishowsthetemperatureincreaseofonedegreefahrenheitbetween1860to2000 graph2isaboutthecarbondioxidecontentintheatmosphere 1958 1990 whatisthemaintopicofthearticle globalwarming thewarmingoftheearth answerkeysforex 2onpage28 thefirstgraphshowstheglobal between and thetemperature anddecreasedoverthisperiodbutonthewholeit byaroundonedegreefahrebhait duringthistime theearthreacheditstemperatureinabout anditshighestin2000 therewasasteady inthetemperatureduringthetwentyyearsafter1980 wecanseefromthegraphthattheearthhasbecome sinceearlylastcentury temperature 1860 2000 increased rose wentup increase rise warmer checkinganswer ii 3m lowest 1910 answerkeysforex 2onpage28 thesecondgraphshowstheamountof intheatmospherefrom to thecarbondioxide steadilyoverthisforty yearperiod itwentupfrom315to370parts million carbondioxide 1957 1997 increase wentup per thetemperaturelastcenturydidn tincreasemuch everyonebelievesthatglobalwarmingiscausedbytheactivitiesofhumans janicefosterbelievesthatglobalwarmingiscausedbtheburningfossilfuels naturalgasisagreenhousegas f f t f 5 carbondioxideisabyproductofburningfossilfuels 6 peopleacceptcharleskeeling sdatabecausehetookaccuratemeasurements 7 floodingcouldbeoneoftheeffectsoffutureglobalwarming 8 georgehambleybelievesscientistsarejustguessingabouttheeffectsofglobalwarming t t t t 9 georgehambleyisworriedabouttheeffectsofcarbondioxideonplantgrowth 10 itisclearwhattheeffectsofglobalwarmingwillbe f f choices 1 whofoundouttheamountofcarbondioxideintheatmospherefrom1957to1977 a dr janicefoster b charleskeeling c georgehambley d sophiearmstrong b readingiv 3m 2 buttherearesomeverydifferentattitudesamongscientiststowardsthisissue issue heremeansthesameastheonein a iboughtthenewstampthedayofitsissue b theyaretalkingaboutoneofthekeyissuesintheelectioncampaign c thegovernmentisexpectedtoissueastatementabouttheelection d themagazinehas12issueseachyear b 3 theauthorprobablyagreesthat a actuallyglobalwarmingisgoodforman b weshoulddonothingabouttheglobalwarming c catastropheswillhappeniftheglobekeepsonwarming d alotremainstobefoundoutabouttheeffectsofglobalwarming d howmanypartscanthetextbedividedinto tips part1 para part2 para to part3 para to part4 para to 1 2 4 5 10 11 readingiii detailedreading 8m adebateoverthe