Unit4How_life_began_on_the_earth 优秀公开课课件

HowlifebeganontheearthPangu__________theskyfromtheearth.盘古开天辟地Saying1separated女娲补天Nuwamendedtheheavenand_________humanbeings.Saying2createdGod_________theworldinsevendays.Saying3createdThedevelopmentofHumanfrom________.Saying4monkeyLifewasbroughttotheearthbyETfrom______space.Saying5outer1.Whatdoesthetexttellus?HowtheearthcomeintobeingTheproblemoftheearthcausedbyhumanbeingHowthehumanbeingbuildtheearthHowthelifedevelopedontheearthTask1FastreadingReadthepassagequicklyandfindouttheanswerstothequestionsbelow.Task1skimming•2.Howdidtheuniversebeginaccordingtoawidelyacceptedtheory?TheuniversebeganwithaBigBang.Task1FastreadingTask1skimmingWhat’sthemainideaforeachPara?Para.1Para.2Para.3Para.4Para.5AtheoryabouthowtheuniversebeganThearrivalofhumansandtheirimpact（影响）ontheearthTheimportanceofwaterforlifeThedevelopmentofplantsandanimalsontheearthTheformation(形成)ofatmosphereandwateronearthTask2carefulreadingTobehonest,noneofusknowshowtheearthbeganbecauseithappenedtoolongago.TrueJudgeTrueorFalsePara.1Task3CarefulreadingPara.1HowdidtheBigBangcreatetheuniverse?Firstofall,it_____matterinall_________.Afterthat,______beganto________.Then,atoms______tocreate_____and___________.threwdirectionsatomsformcombinedstarsotherbodiesPara.21.Whatistheoriginalearth’satmospheremadeupof?carbon,nitrogen,watervapour,andothergasesTheoriginoflifeontheearthisaninterestingquestion.Itwasawidelyaccepted________thattheuniversebeganwitha“BigBang”,afterwhichtheearthwas_________________.Between4.5and3.8billionyearsagoitsettledintoasolid______.Theearthwasvery_______andexplodedloudlywithfireandrock.theywereintimetoproducecarbon,nitrogen,watervaporandothergases,whichweretomaketheearth’s_____________.Thenastheearthcooleddown,waterappeared.theoryacloudofdustglobeviolentatmosphereFillintheblanks:Para.21.Whatmakestheearthdifferentfromtheotherplanetsinthesolarsystem?A.Itproducedalotofheat.B.C.Waterdisappeared.D.Itwastheoldestplanet.ThecontinuedpresenceofwaterPara.32.Howdidwaterhelplifedevelop?Waterallowedtheearthto__________harmfulgasesandacidsintotheoceansandseas,producinga_______________.dissolvechainreactionPara.31.insects2.plants3.reptiles（爬行类）4.shellfish（贝类）5.fish6.amphibians（两栖类）7.mammals(哺乳类)Lookatthepicturesandtellthegroups.Para.41.insects2.plants3.reptiles（爬行类）4.shellfish（贝类）5.fish6.amphibians（两栖类）7.mammals(哺乳类)StudyofthegroupsoflifeLookatthepicturesandtellthegroups.1.insects2.plants3.reptiles（爬行类）4.shellfish（贝类）5.fish6.amphibians（两栖类）7.mammals(哺乳类)Studyofthegroupsoflife(生命的种类/物种)Lookatthepicturesandtellthegroups.1.insects2.plants3.reptiles（爬行类）4.shellfish（贝类）5.fish6.amphibians（两栖类）7.mammals(哺乳类)Studyofthegroupsoflife(生命的种类/物种)Lookatthepicturesandtellthegroups.1.insects2.plants3.reptiles（爬行类）4.shellfish（贝类）5.fish6.amphibians（两栖类）7.mammals(哺乳类)Studyofthegroupsoflife(生命的种类/物种)Lookatthepicturesandtellthegroups.1.insects2.plants3.reptiles（爬行类）4.shellfish（贝类）5.fish6.amphibians（两栖类）7.mammals(哺乳类)Studyofthegroupsoflife(生命的种类/物种)Lookatthepicturesandtellthegroups.1.insects2.plants3.reptiles（爬行类）4.shellfish（贝类）5.fish6.amphibians（两栖类）7.mammals(哺乳类)Studyofthegroupsoflife(生命的种类/物种)Lookatthepicturesandtellthegroups.1.insects2.plants3.reptiles（爬行类）4.shellfish（贝类）5.fish6.amphibians（两栖类）7.mammals(哺乳类)Studyofthegroupsoflife(生命的种类/物种)Lookatthepicturesandtellthegroups.HumanbeingsUsethesentenceinthetexttodescribethepicture:Theyareputtingtoomuchcarbondioxideintotheatmosphere,whichpreventsheatfromescapingfromtheearthintospace.Para.5greenhouseeffectTheearthmaybecometoohottoliveon.Finallyabout____millionyearsagosomesmall_______animals__________,buttheyputlotsofcarbonintotheatmosphere,_____________heatescapingfromtheearthintospace.Asaresultofit,lifeonearthisi____d___________.appearedpreventingnangercleverSummaryPara.52.6Groupcompetition15436Howtheearthcameoutacloudof_____BigBangasolid_______slowlycombinetheearth______downitexplodedloudlywith_____and_____watertheearth’s___________Fillingexercise(Para.1-2)(6)dustball/globefirerockatmospherecooledHowlifebeganontheearthwater1.2.10.3.4.insects(onland)5.6.7._________8.dinosaurs(onland)9._________11.____________small________inwater_________andallsortsoffishgreenplantsonland_____________(onlandandinwater)forests(onland)(onland)smallcleveranimalswith______________Fillingexercise(Para.4)(7)plantsshellfishamphibiansreptilesmammalshandsandfeethumanbeingsQuestions:1)Howdidwatercomeintobeingontheearth?(Para.2)(2)2)Whyisimportanttohavewaterontheearth?(Para.3)(2)Theexplosionoftheearthproducedwatervapour,whichturnedintowaterwhentheearthcooleddown.Itallowedtheearthtodissolveharmfulgasesintooceansandseas.TranslationItwasnotimmediatelyobviousthatwaterwastobefundamentaltothedevelopmentoflife.(4)水会对生命的发展起关键作用，这一点在当时并不明显。Insomefilmsandstories,wecanseedinosaursandpeopletogether.Isitright?Why?(Para.4)(4)Becausedinosaursdiedoutlongbeforehumanbeingsdevelopedontheearth.A.insectsandamphibiansappearB.reptilesappearC.shellfishandotherfishappearD.dinosaursappearE.smallplantsgrowonthewaterF.plantsbegintogrowonlandG.Mammals(includinghumans)appearPuttheminaco