译林版高中英语选必三Unit2 Workbook Building skills 名校教案

Unit2OutofthisworldBuildingskills♦内容分析：本单元的主题语境是“人与自然”，话题是“太空探索”，涉及的语篇类型有：视频、讲座文稿、漫画和杂志文章等。本单元的教学旨在培养学生深入思考人类探索宇宙的意义并学习宇航员奋勇前进、直面挑战的宝贵品质，培养学生对未知世界的好奇心与探索精神，加深学生对国家航天科技发展的认识，增强民族自豪感，激励学生未来为国家科技进步和航天事业发展贡献力量。♦教学目标：Bytheendofthissection,studentswillbeableto:getfamiliarwithextraterrestrialintelligence;collectsomeexpressionstopresentyouropinions;writeanarticletoexpresstheiropiniononMars.♦教学重难点：Tohelpstudentsunderstandthelisteningmaterialsandfinishthelisteningtask;Toencouragestudentstoexpresstheiropinionsbravely;Toguidestudentstofinishtheircomposition.♦教学过程：Step1Lead-inQ:Doyouknowanythingaboutextraterrestrialintelligence?Step2ListeningAlSpaceTalkisapodcastdevotedtoallthingsaboutspace.Thehostisintroducingthesearchforextraterrestrialintelligence(SETI).Listentothetalkandanswerthefollowingquestions.Howlonghasthesearchforextraterrestrialintelligencebeengoingon?Thesearchforextraterrestrialintelligencehasbeengoingonfordecades.Whatdoscientistsusetodetectextraterrestrialmessages?Powerfulradiotelescopes.WhenwasmansfirstSETIattempt?In1960.WhatisthedistancebetweentheEarthandeach"nearby"starinProjectOzma?About11lightyears.WhatdoestheSETIInstitutewanttoexplore,understandandexplain?Theoriginandnatureoflifeintheuniverseandtheevolutionofintelligence.A2Inthesecondhalfofthepodcast,thehostisinterviewingastronomerEileenGuestaboutcontactingextraterrestrials.Listentotheconversationandcompletethenotesbelow.Step3SpeakingA3Inpairs,discusswhetherhumansshouldtrytocontactextraterrestrialintelligence.Usetheexamplebelowtohelpyouandpayattentiontotheexpressionsinbold.Usefulexpressions:alienwhatsoevercivilizationlaunchanattackpushthelimitsofscienceandtechnologymakeagoodpointStep4ReadingandWritingBlWhatwouldacityonMarslooklike?Readthemagazinearticleandanswerthequestionsbelow.WhatarethedangersonMars?Tobeginwith,Marsisextremelycold.Also,itsatmosphereisrichincarbondioxide,sopeoplewillnotbeabletobreathe.Still,withnomagneticfield,Marsisexposedtomuchhigherlevelsofradiation.BrieflysummarizewhatlifeonMarswillbelike.Includeatleastthreeaspects.SinceMarshashighlevelsofradiation,peopleinMartiancitieswillprobablyliveundergroundatfirstandthenaboveground.SinceitisexpensivetosendmaterialstoMars,Martiancitizenswillhavetomakegooduseoftheplanet'sresourcesandmanufactureeverythingtheyneed.Settlerswillprobablyfollowavegandiet.Also,peopletherewillnottravelmuchbecauseoftheradiation.ButtheymaytakeadvantageofMars9lowgravityandinventnewsportstoentertainthemselves.Isitgoodornotforhumanbeingstosettleonotherplanets?Writeashortpassagetoexpressyouropinion.LivingbeyondtheEarthTheUnitedNationshasestimatedthatby2050,theworld'spopulationwillexplodefromtoday'ssevenbilliontooverninebillion.Wedonothaveacluewhatthepossibleconsequenceswouldbe.Notsurprisingly,quiteanumberofpeoplearetoyingwiththeideaofleavingthisplanetandseekinganewfutureinouterspace.Themoststraightforwardbenefitofpopulatingouterspacewouldbethatitincreaseshumanity'schanceofsurvival.Bymovingacertainportionofthepopulationtootherplanets,wecouldrelievetheEarthofitsburden:overpopulation.Plus,thewholeofhumanityisstuckontheEarthandhistoryhastaughtusthatitwouldnotbewisetoputalloureggsinonebasket.Shouldanyplanetarydisasterhappen,forexample,anasteroidcrashingintoourhome,itwouldwipeouttheentirehumanrace.Takingthefirststepstowardsapermanentsettlementonotherplanetswillalsobenefithumanityinotherways.ThemissionstoouterspacehavehelpedandwillcontinuetohelpusdevelopadvancedtechnologiesthatwillnodoubthavepracticalapplicationsbackontheEarth.Forexample,shockabsorbers,originallydesignedtoprotectastronautsduringtheextremeconditionsofspaceshuttlelaunches,arenowusedinmanyearthquake-proneareas.Inaddition,thesegreatprojectswillbringhumankindtogether.Oncewefocusonsuchanambitiouscommongoal,wecanputourdifferencesasideandinsteadworktowardsachievingit.ItistruethattheEarthistheonlyhomehumanbeingshaveeverknown.Howeverre