高一英语必修3 Unit4 Astronomy the science of the stars课件

Unit4Astronomy:thescienceofthestarsaChinese.anastronautShenzhouⅤOct.16,2003maleYangLiweiYangLiwei---SpaceHero;theFirstChinesetospace完成了中国人几千年来的飞天梦。ApicturetakenbyYangLiweiTheSolarSystem1111Onwhichplanetaretherelivesatpresent?EarthAncientChinesehadtheirownideasabouthowlifebeganontheearth.Doyouknowthesestories?Giveanexample,please.Howlifebeganontheearth?Nuwamakeshumanbeingfromtheclay(粘土).Panguseparatestheskyfromtheearth1.Accordingtoawidelyacceptedtheory,theuniversebeganwitha___________thatthrewmatterinalldirections.2.Itwasnotimmediatelyobviousthat___________wastobefundamentaltothedevelopmentof_______.3.TheyareputtingtoomuchCO2intotheatmosphere,whichprevent_______fromescapingfromtheearth.Taskone:Fillintheblanksafterlistening1.Accordingtoawidelyacceptedtheory,theuniversebeganwitha____________thatthrewmatterinalldirections.2.Itwasnotimmediatelyobviousthat___________wastobefundamentaltothedevelopmentof________.3.TheyareputtingtoomuchCO2intotheatmosphere,whichprevent_______fromescapingfromtheearth.Taskone:Fillintheblanksafterlisteningwaterlife“BigBang”heatWhat’sthewritingstyleofthetext?A.Narrative记叙文B.Explanation说明文C.Essay散文11111111111111111111111111111111111111111111111111111111Let’sgettoknowhowlifebeganontheearthTasktwo:Readparagraph1--3quicklybyyourselves.Afterthe“BigBang”,whathappenedontheearth?forseveralbillionyearsafter“BigBang”between4.5and3.8billionyearsagoWhathappenedontheearthatthattime?whatdidtheexplosionproduce?AcloudofdustsettleintoasolidglobeExplode…withfire&rock(produceC,N2,H2O,andothergases)atmospherewaterappearedCooldownLifebeganontheearthWhatdidthewaterdoontheearth?dissolveharmfulgasesinto…Readparagraph4and5quickly,andfindouttheorderofdevelopmentoflifeontheearthwhatkindoflifeformappearedfirst?smallplantsonthewatershellfish&otherfishGreenplantsbegantogrowonlandinsectsandamphibianscanliveonlandandinthewatertheplantsgrewintoforestsreptileslayeggstheageofdinosaursmammalsgivebirthtoyoungbabyanimalscleveranimalsWhatproblemarethesecleveranimalscausing?TheyareputtingtoomuchCO2intotheatmosphereThetextcanbedividedintoPartone:Thedevelopmentofearthitself.Parttwo:Thedevelopmentoflife.LifeinthewaterLifeonthelandOrderofwriting:SummarytwopartsChronological(time)1.Whydidtheplantsgrowbeforetheanimalscame?2.Whyisitwrongtoshowfilmswithdinosaursandpeopletogether?Pair-workDoyouhavemorequestionsafterreadingthetext?Discussthemwithyourpartner.1.Whydidtheplantsgrowbeforetheanimalscame?2.Whyisitwrongtoshowfilmswithdinosaursandpeopletogether?Pair-workBecauseplantsprovideoxygenandfoodforanimals.Becausedinosaursdiedoutlongbeforehumanbeingdevelopedontheearth.WhatwillhappenwhenweputtoomuchCO2intotheatmosphere?greenhouseeffectglobalwarminganimalswilldieoutplantswilldieoutTherewillbenolifeontheearthDiscussionriseofthesealevelicebergsandglaciersmeltAUnitedNationsClimateChangeConferencewillbeheldnextmonth.Ourclassisgoingtowritealettertotheconference.Whatwouldyouliketosayintheletter?DoyouhaveanygoodideasabouthowtopreventGlobalWarming?Pleaseformagroupanddiscuss.OneEarth,OneHomeHealtheworldMakeitabetterplaceForyouandformeandtheentirehumanraceHomeworkReadthetextafterclass.Findmoresolutionstoglobalwarming.Finishtheexercisesinthepaper.