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Welcometo…HOWLIFEBEGANONTHEEARTH?Whatwasthereontheearthbeforelifecouldbegin?Whydoscientiststhinktherehasneverbeenlifeonthemoon?.Doyouknoweachreligionorculturehasitsownideasaboutthebeginningoftheuniverse?StoriesaboutthebeginningoftheuniverseinChina:TheBiblicalAccount“InthebeginningGodcreatedtheheavensandtheearth.Theearthwasformlessandempty,darknesswasoverthesurfaceofthedeep,andthespiritofGodwashoveringoverthewaters.AndGodsaid…”Day1:GodspokeandseparatedlightfromdarknesscreatingDayandNight.Day2:Godspokeandseparatedthewatercreatingskyandocean.Day3:Godspokeandcreateddryland.Day4:Godspokeandcreatedthesun,moonandstars.Day5:Godspokeandcreatedlivingcreaturesintheairandsea.Day6:Godspokeandcreatedthelandanimalsandman.Day7:GodspokerestedandblessedthisdaycallingHoly.2.Doyouknowwhatascientificideais?TheBigBangThebigbangtheorysuggeststhattheuniversewasonceextremelycompact(紧密的)dense(密集的),andhot.Someoriginalevent,acosmic(宇宙的)explosioncalledthebigbang,occurredabout13.7billionyearsago,andtheuniversehasbeenexpanding(扩大的)andcooling.TheSolarsystemAstronomy:thescienceofthestars?HOWLIFEBEGANONTHEEARTHWordsandexpressions:astronomyastronomeratmospheresurfacesolarsystemexplodeplanetharmfuloxygenexistglobalspreadamphibianreptileshellfishmammalmethodprevent…fromdependon1.WhoisthefirstChineseastronauttogointospace?___________2.Whatwasthedatewhenhecircledtheearthinspace?A)November15,2003B)October15,2003C)September17,2004D)December17,20043.Whichcountryfirstsentpeopleuptothespace,theUSAortheSovietUnion?4.Sofar,howmanycountrieshavesucceedinsendingpeopleuptospace?_______Testyourcommonknowledge:YangliweithreeReading•Whatisthemainideaofthetext?howlifebeganontheearth.•Topicsentences:1.Afterthe“BigBang”,theearthwasjustacloudofenergeticdust.2.Whatscientiststhinkthatthedifferentbecauseofthearrivalofsmallplantsgrowinginthewateronitssurface.3.Manymillionsofyearslaterthefirstgreenplantsbegantoappearonland.4.Smallcleveranimals,nowwithhandsandfeet,appearedandspreadallovertheearth.dustplantsplantsanimalsReadthe1stparagraph.1)Howdidwatercomeintobeingontheearth?•Theexplosionoftheearthproducedwatervapour,whichturnedintowaterwhentheearthcooleddown.explosion(n.)---explode(v.)watervapour(vapor)---steam2)What’sthesignificanceofthepresenceofwaterontheearth?Itallowedtheearthtodissolveharmfulgasesintooceansandseas.significance---significant(adj.)harmful---harm(n.)/(v.)doharmtoCanyouputtheorderofdevelopmentoflifeintoatimeline?Usethereadingtohelpyou.•（）Ainsectsandamphibiansappear•（）Basolidball•（）Creptilesappear•（）Dacloudofdust•（）Eshellfishandotherfishappear•（）Fdinosaursappear•（）Gsmallplantsgrowonthewater•（）Hplantsbegintogrowondryland•（）Ipresenceofwater•（）Jmammals(includinghumans)appear123456789103.Discussion:discussthefollowingquestionsandanswerthem•1)Whyisitwronginfilmsandstoriestoshowdinosaursandpeopletogether?•2)Whydoyouthinkthathumansarethecleverestanimalsontheearth?•3)Istheearthgettingwarmereachyear?Ifso,Whateffectswillthishave?Howtosolvethisproblem?SuggestedAnswers:•1)Dinosaursdiedoutlongbeforehumanbeingsdevelopedontheearth.•2)Becausetheyhavelargerbrainsthananyothercreaturesontheearthsofar.•3)Yes.Ifso,theearthwillbesohotthatnolifewillexist（存在）ontheearthanymore.Tosolvethisproblem,peopleshouldprotecttheearthcarefully,theymuststopputtingtoomuchcarbondioxideintotheair,reducepollution,controlthepopulationandsoon.backbackHomeworkFindoutthelanguagepointsyoudon’tunderstandinthetext.