人教新课标高中英语BOOK6UNIT4 READING课件.ppt

Unit4,Globalwarming,江西省横峰中学郑梨香,Whatarethesebuildingsmadeofandwhatistheirpurpose?,Theyaremadeofglassandplantscangrowinitwhenitiscoldoutside.,Haveyoueverseenagreenhouse?,Howdoesitwork?,Theglasstrapstheheatfromthesun,makingtheairwarmsothatplantscangrowbetter.,Theairinsidewaswarmbecausetheglasstrapstheheatfromthesunandkeepsitfromescaping.Thismakesthegreenhouseheatupandsotheplantscangrowthroughoutthecoldperiod.,Whatarethe“greenhousegases”?Whatdoyouthinkgreenhousegasesdo?,greenhouseeffect,Whatsgreenhousegaseseffect?,Greenhousegasesperformthesamefunctionastheglassinagreenhouse-Theytraptheheatofthesunandkeeptheairsurroundingtheearthwarm.Itiscalledthegreenhouseeffect.,TheEarthIsBecomingWarmerButDoesItMatter?,Letsread,Ithasatitle,afirstparagraphthatrunsacrossthepageandisinbold,themaintextintwocolumns,graphs/diagrams,twoquotes.,Skimthetextandfindoutwhatthestructureofamagazinearticlelikethisisandhowthetextisorganized?,Readthetextquicklyandanswerthequestions:,Whowrotethemagazinearticle?Whatisthenameofthemagazine?Whatarethenamesofthethreescientistsmentionedinthearticle?Whatdotheythinkaboutglobalwarming?Dotheyagreewithoneanother?Whatarethetwographsabout?Whatisthemaintopicofthearticle?,SophieArmstrongwrotethemagazinearticle.Thenameofthemagazineis“Earthcare”.,2.Whatarethenamesofthethreescientistsmentionedinthearticle?,TheyareDr.JaniceFoster,CharlesKeelingandGeorgeHambley.,1.Whowrotethemagazinearticle?Whatisthenameofthemagazine?,3.Whatdotheythinkaboutglobalwarming?Dotheyagreewithoneanother?,Therearesomeverydifferentattitudesamongscientiststowardsthisissue.Somethinktheeffectswillbeterrible,whilesomeothersbelievethatweshouldnotworryaboutit.,4.Whatarethetwographsabout?,Graph1showsthetemperatureincreaseofonedegreeFahrenheitbetween1860to2000.,Graph2showsthecarbondioxidecontentintheatmospherefrom1957to1997.,Graph1:,Graph2:,Whatisthemaintopicofthearticle?,Globalwarming/Thewarmingoftheearth.,1.Whatisglobalwarming?,Theearthisbecomingwarmer,Workingroupsoffourtoaskandanswerthefollowingquestions.,2.Howhastheglobalwarmingcomeabout?,Humanactivity-burningoffossilfuels.,Greenhouseeffect-greenhousegases-weneedthosegases.,Hugequantitiesofextracarbondioxide-from1957to1997-fromaround315partspermilliontoaround370partspermillion.,3.Whataretheeffectsofglobalwarming?,Encourageagreaterrangeofanimals.,Thesealeveltorise.,Severestorms,droughts,famines,thespreadofdiseases,anddestructionofspecies.,Makeplantsgrowfaster.Cropswillproducemore.,Construct,Mainideasofeachpart,Part1(1),Introduceadebateovertheissueofglobalwarming.,1.Thetemperaturelastcenturydidntincreasemuch.2.Everyonebelievesthatglobalwarmingiscausedbytheactivitiesofhumans.3.JaniceFosterbelievesthatshecanmeasurethefutureglobalriseintemperature.4.Theriseincarbondioxideiscausingasteadyincreaseinglobalwarming.5.GeorgeHambleybelievesthatglobalwarmingwilldogoodratherthanharmtotheearth.6.Itisclearwhattheeffectsofglobalwarmingwillbe.,Telltrueorfalse.Foreachfalsestatement,writeatrueone.,T,T,F,T,T,F,Shesays,“Wecantpredicttheclimatewellenoughtoknowwhattoexpect,butitcouldbeveryserious.,Nooneknowstheeffectsofglobalwarming.,1.Whatisthepurposeoftheparagraphthatisinbold?,Tointroducethetopic.,Toillustratepointsbyprovidingevidence.,2.Whatarethediagramsfor?,Summary,3.Whyaretheretwographs?,Becausetheyareimportantorinterestingpoints.Theiraimistoattractyourattentionandtomakeyoureadthem,andthereforetomakeyouinterestedenoughtoreadthewholearticle.,Itfunctionsasaconclusionbyaskingthereadertoreflectonthemajorthemeofthetextandtopr