How Life Began on the Earth武邑中学优质课.ppt

人教版高一英语必修3,Unit4ReadingHowLifeBeganontheEarth,河北武邑中学郭丽梅,八大行星,你知道吗？,(水星Mercury）,（金星Venus）,（火星Mars）,(木星Jupiter),(天王星Uranus）,(海王星Neptune）,（地球Earth）,(土星Saturn),Doyouwanttoknowmoreinformationabouttheuniverse?,探索生命起源,Doyouknowtheoriginoflifeontheearth?,Panguseparatestheskyfromtheearth,Nvwamakeshumanbeings,Godcreatedtheworldinsevendays,Unit4,HowLifeBeganontheEarth,Pleaseretellthepassageaccordingtothevideo.,oralpractice,speaking,1.Thedevelopmentoftheearth(para1-2),TheBigBang,TheBigBang,(1)AftertheBigBang,whathappened?,acloudofdust,aviolentsolidglobe,explodedwithfireandrock,producedcarbon,nitrogen,watervapour&gases,Madetheearthsatmosphere,Waterappeared,(4)Whatappearedontheearththen?,(5)Whatdidthewaterform?,oceansandseasappeared,水Waterisfundamentaltothedevelopmentoflife.,2.Thedevelopmentoflife(para3-4),smallplants,First,earlyshellfish,allsortsoffish,greenplantsonland,insectsonland,Next,amphibiansonlandandinthewater,GreenplantsgrewintoforestsLater,reptilesonland,dinosaursonland,(1)Whatlifedevelopedafterforestsappeared?,Afterthat,mammalsonland,(2)Whatlifedevelopedafterdinosaurs?,smallcleveranimals,(3)Whatlifedevelopedaftermammals?,Finally,任务型学习matchthemainideawitheachparagraph.,Para.1A.Theformation(形成)oftheearth.Para.2B.Theimportanceofwaterforlife.Para.3C.AwidelyacceptedtheorytheBigBangPara.4D.Thearrivalofhumansandtheirimpactontheearth.Para.5E.Thedevelopmentofplantsandanimalsontheearth.,Puttherightorderofdevelopmentoflifeintoatimeline,1.Insectsandamphibiansappeared.2.Dinosaursappeared.3.Theearthbecameasolidball.4.Smallplantsgrewonthewater.5.Reptilesappeared.6.Plantsbegantogrowondryland.7.Theearthwasacloudofdust8.Waterappearedontheearth9.Shellfishandotherfishappeared.10.Theuniversebeganwitha“BigBang”.11.Cleveranimalswithhandsandfeetappeared12Mammalsappeared,FillintheblanksaccordingtothetextAfterthe“BigBang”,theearthwasjustacloudofdust.It_loudlywithfireandrock,whichwere_toproducethewatervapour,_andothergases.Thensmallplantsgrew.They_andfilledtheoceansandseaswithoxygen.,exploded,intime,carbondioxide,multiplied,Manymillionsofyearslater，thefirstgreenplantsbeganto_onland.Whentheplantsgrewintoforests,reptilesappeared_.Theyproducedyounggenerallyby_eggs.,appear,laying,forthefirsttime,Whendinosaursdisappeared,mammalsbecamemore_.Nowsmallcleveranimalswith_appearedand_allovertheworld.,important,handsandfeet,spread,Astimewentby,theycoveredtheearthandtheyareputtingtoomuchcarbondioxideintothe_,which_heat_theearthintospace.Whetherlifewillcontinueonearthformillionsofyearstocomewill_whetherthisproblemcanbesolved.,atmosphere,prevents,from,dependon,Discussion,1.Whywastheearthdifferentfromtheotherplanets?2.Whydidtheplantsgrowbeforetheanimalscame?3.Whyisitwrongtoshowfilmswithdinosaursandpeopletogether?4.Whatproblemiscausedbyhumanbeings?,Theyareputtingtoomuchcarbondioxideintotheatmosphere,whichpreventsheatfromescapingfromtheearthintospace.,Theearthmaybecometoohottoliveon.,Theearthisbecominghotterandhotter,Whatdoyouwanttosay?,Healtheworld拯救地球,OneEarth,OneHome一个地球，一个家园Healtheworld拯救这世界Makeitabetterplace让她变得更美好Foryouandformeandtheentirehumanrace.为你、为我、为了全人类,Homework1