选修uni公开课ppt课件.ppt

Welcometomyclass 1 Unit4GlobalWarming TheEarthisBecomingWarmer ButDoesItMatter 地球在变暖 要不要紧 Reading 2 NewWordsandexpressions temperature温度onedegreeFahrenheit华氏一度explore探索humanactivities人类活动phenomenon现象subscribeto同意 赞成fossilfuels矿物燃料byproduct副产品 greenhouse gases温室气体atmosphere大气methane甲烷 沼气 degreeCelsius摄氏度quantitiesof大量的accuratemeasurements精确的测量data资料 数据catastrophe大灾难beopposedto反对environmentalconsequences环境影响agreatrangeof大量的evenif即使keepon继续 3 Skimming Skimthetitle THEEARTHISBECOMINGWARMER BUTDOESITMATTER Whatisthemaintopic Theearth B Globalwarming C Becomingwarmerdoesn tmatter 4 Thestructureofthearticle Introduction Atitle Body Conclusion 5 Skimthebodypart 7paras Para 1 Para 2 3 I II Para 4 6 III Para 7 IV Introduction Body Conclusion 6 Matchthemainideaofeachpart Explainhowglobalwarmingcomesabout Twodifferentattitudesamongscientiststowardstheconsequencesofglobalwarming Introducetheproblemofglobalwarming Giveawarningandraiseaquestionforthereaderstothinkover I 1 II 2 3 III 4 6 IV 7 7 Whowrotethearticle Whatisthenameofthemagazine Carefulreading thefirstparagraph SophieArmstrong EarthCare 8 PartII Para2 3 Everyonebelievesthatglobalwarmingiscausedbytheactivitiesofhumans JaniceFosterbelievesthatshecanmeasurethefutureglobalriseintemperature GreenhouseGasesaretotallybad F T F 9 FillintheblanksaboutthecausesofGreenhouseeffect henomenon uantities rapped goup Small 10 Para4 thelevelsofcarbondioxidehaveincreasedgreatlyoverthelast100to150years Whomadeaccuratemeasurementsoftheamountofcarbondioxide 2 Howmuchhasincreased CharlesKeeling Thecarbondioxideintheatmospherewentupfromaround315partstoaround370partspermillion 11 Para5 Howhighwillthetemperaturego Theamountofwarmingcouldbeaslowas1to1 5degreesCelsius butitcouldbeashighas5degrees 12 WhatdoDr JaniceFosterandthescientistGeorgeHambleythinkabouttheconsequencesofglobalwarming Dotheyagreewithoneanother Para6 Theydon tagreewitheachother Dr JaniceFosterthinksitisserious GeorgeHambleythinksglobalwarmingwillbemildwithfewbadenvironmentalconsequences 13 Doesglobalwarmingmatter Positiveeffects Negativeeffects 14 causethesealeveltoriseseverestormsfloodsdroughtsfaminesthespreadofdiseasesdisappearanceofspecies Positiveeffects Negativeeffects 15 causethesealeveltoriseseverestormsfloodsdroughtsfaminesthespreadofdiseasesdisappearanceofspecies Positiveeffects Negativeeffects makeplantsgrowquickercropswillproducemoreagreaterrangeofanimalsmakelifebetter 16 Disscussion Howtoreducegreenhousegases Haveadisscussionwithyourclassmates 17 Theearthisbecomingwarmer doesitmatter 18 Homew