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Unit4Astronomy:thescienceofthestarsAstronomyisthescientificstudyoftheu______andtheheavenbodies(suchasthesun,themoon,ands_____),gas,andd____withinit.astronomerniversetarsustsolarsystem[ˈjʊrənəs]['viːnəs][mɑ:z][ˈmɜrkjəri][ˈdʒu:pɪtə][ˈneptju:n][ˈsætɜ:n]•Eachreligionandculturehasitsownideasabouthowlifebeganonearth.•InChineselegend,________separatestheskyfromtheearthand________madehumans.•InBible,_______createdtheworldin____days.NvwaPanguGod7AndGodsaid,Lettherebelight:andtherewaslight.神说，要有光，就有了光。Howlifebeganontheearth?1.What’sthewritingstyleofthetext?A.NarrativeB.ExpositoryC.DescriptiveD.Persuasive2.HowdoestheauthordevelopA.GiveexamplesB.IntimeorderC.ComparisonB.Expository说明文B.IntimeorderChoosethemainideaforeachparagraph()Thearrivalofhumansandtheirimpactontheearth()Theformationoftheearth()Thedevelopmentofplantsandanimalsontheearth()Awidelyacceptedtheoryabouttheformationoftheuniverse()Theimportanceofwaterforlife54213Para.1Itisawidelyacceptedtheorythattheuniversebeganwitha___________.“BigBang”threw________inalldirections,andatomsbegantoformandcombinetocreate_____andother______.“BigBang”matterstarsbodiesPara.2:Theformationoftheearth1.Forseveralbillionyearsafterthe“BigBang”,theearthwasa______________andwhatitwastobecomewas_________.2.Between4.5and3.8billionyearsago,thedustsettledintoa_____________.3.However,theearthwasso______thatitexplodedwith____and_____.Asaresult,theyproduced_______,________,_______andothergases,whichmakestheearth’s_________.4.Astheearthcooleddown,______begantoappearonitssurface.cloudofdustwateratmospherecarbondioxidenitrogenwatervapourrockfireviolentsolidglobeuncertainPara.3:TheimportanceofwaterforlifeWhichwordinpara.3hassimilarmeaningwith“important”?fundamentalThe_________________ofwateristothedevelopmentoflife.continuedpresence同义句改写：Thecontinuedpresenceofwater_____________________________.madeitpossibleforlifetodevelopTimePlacePlantsAnimals3billionyearsago540millionyearsago250millionyearsago65millionyearsagoPara.4:The___________oflifeontheEarthOceansandseasSmallplantsEarlyshellfishandallsortsoffishlandforestsGreenplantsInsects;amphibiansReptilesdinosaursMammalsdevelopmentevolutionPara.5:Thearrivalofhumansandtheirimpactontheearth•What’sthemainproblemthathumansbringtotheearth?Theyareputtingtoomuchcarbondioxideintotheatmosphere,whichpreventsheatfromescapingfromtheearth.Asaresult,theearthmaybecometoohottoliveon.WhatwillhappenwhenweputtoomuchCO2intotheatmosphere?greenhouseeffectglobalwarminganimalswilldieoutplantswilldieoutTherewillbenolifeontheearthriseofthesealevelicebergsandglaciersmeltNooneknowsexactlyhowtheearthbegan.Each1_________(religious)andculturehasitsownideasabouthowlifebeganonearth.However,accordingtoawidelyacceptedtheory,theuniversebeganwithaBigBang“.Itexploded2________(violent)withfireandrock.Theywereintimetoproducecarbondioxide,nitrogen,watervapourandothergases.WaterhadalsoappearedonotherplanetslikeMars3_______ithaddisappearedlater.4______manyscientistsbelieveisthatthecontinuedpresenceofwaterallowedtheearthtodissolve5________(harm)gasesandacidsintotheoceans,whichmadeitpossibleforlife6______develop.religionviolentlybutWhatharmfultoManymillionsofyearslater,thefirstextremelysmallplants7___________(multiply)andfilledtheoceansandseaswithoxygen.Laterwhentheplantsgrewintoforests,reptilesappearedforthefirsttime.Theyproducedyounggenerallyby8________(lay)eggs.Afterthat,somehugeanimals,9________(call)dinosaurs,developed.However,65millionyearsagothedinosaursdisappeared,whichmadepossibletheriseofmammalsontheearth.Theseanimalsweredifferentfromalllifeformsinthepast,becausetheygavebirth10_______youngbabyanimalsandproducedmilktofeedthem.tomultipliedlayingcalled1.太阳系2.使某人对某事感兴趣3.对…感兴趣4.生命的起源5.宗教和文化6.一种普遍被接受的理论7.四面八方8.及时；终于9.地球的大气层10.更为重要的是…11.在它的表面12.与地球不同14.对…很重要15.允许某人做某事16.有害气体17.使生命发展成为可能18.下蛋19.仍然是谜20.产生；分娩21.轮到某人；接着22.阻止某人做某事23.从……逃脱24.结果25.取决于；决定于；依靠26.解决问题1.太阳系2.使某人对某事感兴趣3.对…感兴趣4.生命的起源5.宗教和文化6.一种普遍被接受的理论7.四面八方8.及时；终于9.地球的大气层10.更为重要的是…11.在它的表面12.与地球不同1.solarsystem2.interestsb.insth.3.beinterestedin4.theoriginoflife5.religionandculture6.awidelyacceptedtheory7.inalldirections8.intime9.theearth’satmosphere10.Whatisevenmoreimportantisthat….11.onitssurface12.unliketheearth14.对…很重要15.允许某人做某事16.有害气体17.使生命发展成为可能18.下蛋19.仍然是谜20.产生；分娩21.轮到某人；接着22.阻止某人做某事23.从……逃脱24.结果25.取决于；依靠26.解决问题14.befundamentalto15.allowsb.todo16.harmfulgases17.makeitpossibleforlifetodevelop18.layeggs19.remainamystery20.givebirthto21.inone’sturn22.prevent…from…23.escapefrom24.asaresult25.dependon26.solvetheproblem1.______itwastobecomewasuncertainuntilbetween4.5and3.8billionyearsago______thedustsettledintoasolidglobe.2.______isevenmoreimportantis_____astheearthcooleddown,waterbegantoappearonitssurface.1._________________（使大家吃惊的是）isthathedidn’tcometothemeeting.2._________________（他所做的）addedtoourdifficulty.3.___________________（我们众所周知的是）isthatthe2008OlympicGamesshowedanewimageofChinatotheworld.重点句型WhatsurprisedusWhathehaddoneWhatisknowntousWhatWhatwhenthat3.水对于生命的发展会起关键作用，这一点在当时并不明显。____wasnotimmediatelyobviousthatwaterwas______fundame