globalwarming.ppt

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Welcome WordsstudyGlobalwarmingUnit4 energysourcesWedependonenergytodomanythingsinourdailylives.Forexample,energylightsourcitiesandheatsourbuildings.Makealistofthingsthatuseenergyinyourhome,inyourschool,oranyotherplacesyoucanthinkof. stovelightthingsthatuseenergyinyourhomemicro-waveovencassetteplayerheatingtelevisionhairdryervideoplayerfridgecomputerwashingmachinestove Windenergyisusedaspowertoproduceelectricity.Windmills whereelectricityisproducedbyburningcoals.Thecoalpowerstations inwhichoilisrefinedandmadepure.TheOilRefineries炼油厂 afacility（设施）designedtochangenuclearenergyintoelectricity.Anuclearpowerplant areusedtokeepbackwaterandraiseitslevelforirrigation（灌溉）orforproducingelectricity,etc.TheHydro-electricdams水电站坝 Anenergysourceis“renewable”whensuppliesofitneverrunoutand“non-renewable”whenonedaytheywillrunout.Whichenergysourcesonyourlistarerenewableandwhicharenon-renewable?Discuss ThingsthatuseenergyinyourhomeSourcesofenergyRenewable/non-renewablelightheatingtelevisioncassetteplayervideoplayercomputerfridgestovewashingmachinehairdryercoaloilnaturalgaswind(windpower)sun(solarenergy)uranium(铀)water(hydro-electricpower)plantwaste(生物质能)hotspringorgeysers（喷泉）thesea(潮汐能)non-renewablenon-renewablenon-renewablerenewablerenewablenon-renewablerenewablerenewablerenewablerenewable Whatarethesebuildingsmadeofandwhatistheirpurpose?Theyaremadeofglassandplantscangrowinitwhenitiscoldoutside. traptheheatfromthesunkeepitfromescapingwarmAgreenhouseHowdoesitwork?（materialandusage） Greenhousegases!What’sgreenhousegaseseffect?Greenhousegasesperformthesamefunctionastheglassinagreenhouse---Theytraptheheatofthesunandkeeptheairsurroundingtheearthwarm.Itiscalledthegreenhouseeffect. TheEarthIsBecomingWarmer–ButDoesItMatter? ?Para.4?Para.1?Para.2?Para.3?Para.5BCADEchoosethetopicsentencePara6Para7??GFTheburningoffossilfuelsincreasestheearth’stemperature.B.Introducethetopicofthepassage.C.Humanactivitycausedglobalwarming.D.TheburningoffossilfuelsincreasescarbondioxideE.Thelevelsofcarbondioxidehaveincreasedgreatly.F.differentattitudesamongscientistsG.Nooneknowswhattheeffectsofglobalwarmingwillbe.Fastreading Matchthepartswiththemainideas:part1（para1）part2（para2-5）part3（para6）part4（para7）Explainhowglobalwarmingcomesabout.Introducethetopicofglobalwarming.It’suptoreaderstothinkanddecidewhetherpeopleshoulddosomethingaboutglobalwarmingornot.Listtwodifferentattitudesamongscientiststowardsglobalwarming. Itis____________thathascausedthisglobalwarming.Besides,theincreaseinthetemperatureisalsodueto__________,somebyproductsofwhichiscalled____________,themostimportantoneofwhichis_____________.Weneed_________________tokeeptheearthwarmenough,but__________________________maycausetheglobaltemperaturetogoup.Howhastheglobalwarmingcomeabout?humanactivityburningoffossilfuelsgreenhousegasescarbondioxidesmallamountsofgaseshugequantitiesofextracarbondioxidePara2-3Detailedreading Whatarethetwographsabout?Graph1showsthetemperatureincreaseofonedegreeFahrenheitbetween1860to2000.Graph2showsthecarbondioxidecontentintheatmospherefrom1957to1997.Graph1:Graph2: 3.ThedifferentideasbetweenDr.JaniceFoster&GeorgeHambleyDr.JaniceFosterGeorgeHambleyCarbondioxidehascausedtheglobaltemperatureto_____.Anincreaseoffivedegreeswouldbea_________andcouldbe______________.Morecarbondioxideisa__________thing,whichmakescrops__________moreandwillen-courage___________________________.goupcatastropheveryseriouspositiveproduceagreaterrangeofanimalsPara6 4.Whataretheeffectsofglobalwarming?（negative）1.Thesealevel_____2.Severe______,_______,,______,_____thespreadofdiseases,andthedestructionofspeciesistorisestormsdroughtsfloodsfamines 1.Thetemperaturelastcenturydidn’tincreasemuch.2.Itisbelievedthatglobalwarmingiscausedbytheactivitiesofhumans.3.Allscientistsbelievethatglobalwarmingiscausedbyburningfossilfuels.4.GeorgeHambleyisworriedabouttheeffectsofcarbondioxideonplantgrowth.5.Itisclearwhattheeffectsofglobalwarmingwillbe.★★★Arethesestatementstrueorfalse?TTTFF listening1.Whofoundouttheamountofcarbondioxideintheatmospherefrom1957to1977?A.Dr.JaniceFoster.B.CharlesKeeling.C.GeorgeHambley.D.SophieArmstrong.Listentothereadingpassageanddosomechoices. 2."Buttherearesomeverydifferentattitudesamongscientiststowardsthisissue.”“issue"heremeansthesameastheonein___.A.Iboughtthenewstampthedayofitsissue.B.Theyaretalkingaboutoneofthekeyissuesintheelectioncampaign.C.Thegovernmentisexpectedtoissueastatementabouttheelection.D.Themagazinehas12issueseachyear. 3.Theauthorprobablyagreesthat________A.actuallyglobalwarmingisgoodforman.B.weshoulddonothingabouttheglobalwarming.C.catastropheswillhappeniftheglobekeepsonwarming.D.alotremainstobefoundoutabouttheeffectsofglobalwarming. discussionWhatcanwedotocontroltheglobalwarming? greenthesurroundingsandprotecttheforests. usemorerenewableenergy. rareplantsrareanimals3.Makelaws 4.Media（媒体） Joinhandstoprotectourhome.Hopeforthebest,preparefortheworst.Oneworld,onedream! AssignmentAccordingtotheresultsofourdiscussions,pleasewriteanarticleabouttheeffectsofglobalwarming. Thankyou!Bye-bye