Unit2Globalwarming课时安排Warmingup&Pre-readingReadingandcomprehendingLearningaboutlanguageUsinglanguageLanguagepointsTeachinggoals:TolearnthecausesandtheeffectsofglobalwarmingTolearnaboutusefulwordsandexpressionsTograspthegrammar—howtouse“it”foremphasisinasentenceTolearnhowtoexpressagreementanddisagreement,blameandcomplaint.Tolearnhowtowritereportaboutsavingresourcesandprotectingtheenvironment.PeriodOne:Warmingup&Pre-readingWarming-upLeadinginbybrainstormPutthestudentsintogroupsoffouranddiscussthefollowingquestions:1.Whatdoweuseenergyfor?2.Whatarethesourcesofenergy?3.Whatsourcesarerenewableandwhatarenon-renewable?1.(differently)Lights,heating,andallkindsofelectricequipmentuseenergy2.coal,oil,solarpanels,nuclearenergy,naturalgas,windpower,water,plantwaste,tidalenergy,ect.2.coal;oil;solarpanels;nuclearenergy;naturalgas;windpower;water;plantwaste;tidalenergy,ect.3.fillinaform:Pre-reading1.Weusemuchenergyinourdailylife,whatistheeffectofusingenergyinourworld?Theuseofenergy---Giveoffcarbondioxide,otherwastedgasesandheatintotheair---Theearthisbecomingwarmerandwarmer.(globalwarming)Greenhouseeffect2.Howdoesagreenhousework?Thegreenhousetrapstheheatfromthesunandkeepsitfromescaping,whichcanmakeitheatupandsotheplantscangrowthroughoutthecoldperiod.3.Underthisgreenhouseeffect,whathappens?Theearthisbecomingwarmerandwarmer.PeriodTwo:ReadingTopic:shortpassageaboutglobalwarming.LeadinginTostimulateSs’interestinreadingthetext.DividetheSsintogroupsoffour.Discussthefollowingthreequestions.1.Whatisglobalwarming?Theearthisbecomingwarmer2.Howhasthiscomeabout?non-renewablenaturalgasrenewablethesea(tidalenergy)renewablehotspringsorgeysersrenewableplantwaste(biomassenergy)renewablewater(hydro-electricpower)non-renewableuranium(nuclearenergy)Renewable/non-renewableSourcesofenergyHumanactivity—burningoffossilfuelsGreenhouseeffect—greenhousegases—weneedgasesHugequantitiesofextracarbondioxide3.Whataretheeffectsofglobalwarming?ThesealeveltoriseSeverestorms,droughts,famines,thespreadofdiseases,andthedestructionofspecies.Task1:SkimmingAsktheSstohaveaquicklookatthemagazinearticle.Thenencouragethemtotellwhattheynoticeabouthowthetextisorganized.(Answer:Ithasatitle;afirstparagraphthatisinbold;themaintext;diagrams;twoquotes)Task2:ScanningToglanceatthetext,andanswerthefollowingquestions.1.Whowrotethemagazinearticle?Whatisthenameofthemagazine?SophieArmstrongwrotethemagazinearticle.ThenameofthemagazineisEarthCare.2.Whatarethenamesofthethreescientistsmentionedinthearticle?TheyareDr.JaniceFoster,CharlesKeelingandGeorgeHambley.3.Whatdotheythinkaboutglobalwarming?Dotheyagreewithoneanother?Theydon'tagreewitheachother.Dr.JaniceFosterthinkstheeffectsofglobalwarmingcouldbeveryserious.GeorgeHambleythinksglobalwarmingwillbemildwithfewbadenvironmentalconsequences.CharlesKeelingbelievesitistheburningofmoreandmorefossilfuelsthatisresultinginabigincreaseincarbondioxide.4.Whatarethetwographsabout?GraphIshowsthetemperatureincreaseofonedegreeFahrenheitbetween1860to2000.Graph2isaboutthecarbondioxidecontentintheatmosphere,1957--1997.5.Whatisthemaintopicofthearticle?Globalwarming/thewarmingoftheearth.Task3:IntensivereadingAskSstoreadthetextcarefullyandsumupthemainideaofeachpart.Partone(para1)Introduceadebateovertheissueofglobalwarming.Skills:RaisingaquestionParttwo(para2-3)Illustrate(explain)howglobalwarmingcomesabout.Skil...
