人教版高二英语选修六第四单元课文预习PPT课件.ppt

高中英语人教新课标选修6Unit4warmingupandreading,Unit4,-warmingupandreading,Globalwarming,energysources,Wedependonenergytodomanythingsinourdailylives.Forexample,energylightsourcitiesandheatsourbuildings.Makealistofthingsthatuseenergyinyourhome,inyourschool,oranyotherplacesyoucanthinkof.,stove,light,thingsthatuseenergyinyourhome,micro-waveoven,cassetteplayer,heating,television,hairdryer,videoplayer,fridge,computer,washingmachine,stove,Windenergyisusedaspowertoproduceelectricity.,Windmills,whereelectricityisproducedbyburningcoals.,Thecoalpowerstations,inwhichoilisrefinedandmadepure.,TheOilRefineries,afacilitydesignedtoconvertnuclearenergyintoelectricity.,Anuclearpowerplant,ontheroofofahouseonabrightsunnydayareusedtocollectsolarenergy,makingyourhousewarmorheatingyourwater.,Solarpanels,areusedtokeepbackwaterandraiseitslevelforirrigationorforproducingelectricity,etc.,TheHydro-electricdams,Guessit!,UraniumOre(铀矿石)Theelementuraniumdoesnotoccurinpureforminnaturebutisfoundinmineralssuchascarnotite（钒钾铀矿）,picturedhere.,Whatsourceofenergy?,Geysers(间歇泉),Geothermal(地热的)EnergyPlant,Anenergysourceis“renewable”whensuppliesofitneverrunoutand“non-renewable”whenonedaytheywillrunout.Whichenergysourcesonyourlistarerenewableandwhicharenon-renewable?,Discuss,light,heating,television,cassetteplayer,videoplayer,computer,fridge,stove,washingmachine,hairdryer,coal,oil,naturalgas,wind(windpower),sun(solarenergy),uranium(nuclearenergy),water(hydro-electricpower),plantwaste(biomassenergy),hotspringorgeysers(geothermalenergy),thesea(tidalenergy),non-renewable,non-renewable,non-renewable,renewable,renewable,non-renewable,renewable,renewable,renewable,renewable,Whatarethesebuildingsmadeofandwhatistheirpurpose?,Theyaremadeofglassandplantscangrowinitwhenitiscoldoutside.,Howdoesitwork?,Theglasstrapstheheatfromthesun,makingtheairwarmsothatplantscangrowbetter.,Greenhousegases!,Whatsgreenhousegaseseffect?,Greenhousegasesperformthesamefunctionastheglassinagreenhouse-Theytraptheheatofthesunandkeeptheairsurroundingtheearthwarm.Itiscalledthegreenhouseeffect.,TheEarthIsBecomingWarmerButDoesItMatter?,FastReading,Glanceatthearticleandanswerthequestion.,Ithasatitle,afirstparagraphthatrunsacrossthepageandisinbold,themaintextintwocolumns,graphs/diagrams,twoquotes.,Whatisthestructureofamagazinelikethisandhowisthetextorganized?,Readingcomprehension,Readthearticleagainandfinishcomprehendingonpage27,SophieArmstrongwrotethemagazinearticle.Thenameofthemagazineis“Earthcare”.,2.Whatarethenamesofthethreescientistsmentionedinthearticle?,TheyareDr.JaniceFoster,CharlesKeelingandGeorgeHambley.,1.Whowrotethemagazinearticle?Whatisthenameofthemagazine?,3.Whatdotheythinkaboutglobalwarming?Dotheyagreewithoneanother?,Therearesomeverydifferentattitudesamongscientiststowardsthisissue.Somethinktheeffectswillbeterrible,whilesomeothersbelievethatweshouldnotworryaboutit.,4.Whatarethetwographsabout?,Graph1showsthetemperatureincreaseofonedegreeFahrenheitbetween1860to2000.,Graph2showsthecarbondioxidecontentintheatmospherefrom1957to1997.,Graph1:,Graph2:,5.Whatisthemaintopicofthearticle?,Globalwarming/Thewarmingoftheearth.,1.Thetemperaturelastcenturydidntincreasemuch.2.Everyonebelievesthatglobalwarmingiscausedbytheactivitiesofhumans.3.JaniceFosterbelievesthatglobalwarmingiscausedbyburningfossilfuels.4.Naturalgasisagreenhousegas.5.Carbondioxideisabyproductofburningfossilfuels.6.PeopleacceptCharlesKeelingsdatabecausehetookaccuratemeasurements.,Readthearticlecarefully.Telltrueorfalse.,T,T,F,T,T,F,Detailed-Reading,Readthearticleindetailsandfinishthefollowingtask.,listening,1.Whofoundouttheamountofcarbondioxideintheatmospherefrom1957to1977?A.Dr.JaniceFoster.B.CharlesKeeling.C.GeorgeHambley.D.SophieArmstrong.,Listentothereadingpassageanddosomechoices.,2.Buttherearesomeverydifferentattitudesamongscientiststowardsthisissue.”“issueheremeansthesameastheonein_.A.Iboughtthenewstampthedayofitsissue.B.Theyaretalkingaboutoneofthekeyissuesintheelectioncampaign.C.Thegovernmentisexpectedtoissueastatementabouttheelection.D.Themagazinehas12issueseachyear.,3.Theauthorprobablyagreesthat_A.actuallyglobalwarmingisgoodforman.B.weshoulddonothingabouttheglobalwarming.C.catastropheswillhappeniftheglobekeepsonwarming.D.alotremainstobefoundoutabouttheeffectsofglobalwarming.,Questionnaires-I,1.DoesSophieArmstrongsupportaclearopinion?2.DoesGeorgeHambleybelievethatweshouldworrymuchabouttheglobalwarming?,No.hedoesntstateitclearly.,No,hedoesnt.,3.Howhastheglobalwarmingcomeabout?,Humanactivity-burningoffossilfuels.,Greenhouseeffect-greenhousegases-weneedthosegases.,Hugequantitiesofextracarbondioxide-from1957to1997-fromaround315partspermilliontoaround370partspermillion.,4.Whataretheeffectsofglobalwarming?,Encourageagreaterrangeofanimals.,Thesealeveltorise.,Severestorms,droughts,famines,thespreadofdiseases,anddestructionofspecies.,Makeplantsgrowfaster.Cropswillproducemore.,mainidea,Part1(para1),Introduceadebateovertheissueofglobalwarming,Part2(para2),Part3(para3-8),Part4(para9),Illustratehowglobalwarmingcomesabout,Listtwodifferentattitudesamongscientiststowardsglobalwarming,Itsuptoreaderstothinkanddecidewhetherpeopleshoulddosthaboutglobalwarmingornot,4parts,1.Whatisthepurposeoftheparagraphthatisinbold?,Tointroducethetopic.,Toillustrate(阐述)pointsbyprovidingevidence.,2.Whatarethediagramsfor?,Questionnaires-II,3.Whyaretheretwoquotes?,Becausetheyareimportantorinterestingpoints.Theiraimistoattractyourattentionandtomakeyoureadthem,andthereforetomakeyouinterestedenoughtoreadthewholearticle.,Itfunctionsasaconclusionbyaskingthereadertoreflectonthemajorthemeofthetextandtopredictwhatmighthappeninthefuture.,4.Whatisthep