人教新课标高一英语必修3Unit4Reading课件.ppt

ModuleIIIUnit4,Astronomy,Whatsthemeaningoftheword“Astronomy”?,I.Warmingup,行星,thescienceofstars;,2.Doyouknowthefollowingterms?,star,planet,thesun/moon/earth,solarsystem,太阳系,恒星,AQuizGame,1.Howoldistheearth?A.About3.5billionyearsB.About4.5billionyearsC.About5.5billionyearsD.About6.5billionyears2._oftheearthsurfaceiscoveredbywater.A.20%B.30%C.50%D.70%,3.HowmanyplanetsarethereintheSolarSystem?A.6B.7C.8D.94.Whatisthetotalpopulationofhumansontheearth?A.About3.5billionB.About4.5billionC.About5.5billionD.About6.5billion,5.Howlongdoestherotation(自转)oftheearthtake?A.12hoursB.24hoursC.amonthD.365days6.Whichcontinentisthesmallest?A.AfricaB.NorthAmericaC.SouthAmericaD.Oceania7.OnwhatdayistheEarthdaycelebrated?A.April22B.May4C.August21D.November11,8.Whichoceanisthelargest?A.ThePacificOceanB.TheArcticOceanC.TheIndianOceanD.TheAtlanticOcean9.Whichcountryhasthelargestarea?A.CanadaB.ChinaC.RussiaD.U.S.A,4.Doyouknowthecorrectorderoftheirdistancetothesun?,nearesttothesun?,farthesttothesun?,海王星Neptune,水星Mercury,金星Venus,地球Earth,火星Mars,木星Jupiter,土星Saturn,天王星Uranus,5.Thenamesofeightplanets.,MercuryVenusEarthMarsJupiterSaturnUranusNeptune,1)水星2)金星3)地球4)火星5)木星6)土星7)天王星8)海王星,Pluto,ScientistsnowthinkPlutoistoosmalltobecalledaplanet.,Inthisunit,welllearnsomethingmorescientific.,2.Fromthetitle,wecanpredictthatthetextmaytellustheoriginoflifeontheearth.Doyouknowsomestoriesaboutit?,Howlifebeganontheearth,Panguseparatestheskyfromtheearth.,中国神话传说中有盘古开天地的说法。巨人盘古用一把利斧劈开混沌,将天地分开。死后,他的气息化成风和云,声音变成轰轰的雷声,左眼化为太阳,右眼化为月亮,手足与四肢变成大地的四极与五方的名山,血液化成江河,筋脉铺成道路,肌肉形成田地,须发成为星星,牙齿和骨骼化为金属、珍珠、玉石,汗水成为滋润万物生长的甘霖和雨露。,Nvwamadehumans.,Otherlegendsaboutthebeginningofuniverse.,1.Whendidthe“BigBang”happen?,Readthepassagequicklyandanswerthequestions.,2.Whatformwastheearthafterthe“BigBang”?3.Whatmadeuptheearthsatmosphere,4.Howdidwatercomeintobeingontheearth?,5.Whatsthesignificanceofthepresenceofwaterontheearth?,6.Whatwasimportanttothedevelopmentoffish?7.Whatmadepossibletheriseofmammalsontheearth?,8.Whyaremammalsdifferentfromalllifeformsinthepast?,1.Whendidthe“BigBang”happen?Ithappenedseveralbillionyearsago.,Scanning,Readthepassagequicklyandanswerthequestions.,2.Whatformwastheearthafterthe“BigBang”?Theearthwasstilljustacloudofdust.3.Whatmadeuptheearthsatmosphereaftertheearthexploded?Carbon,nitrogen,watervapourandothergases.,4.Howdidwatercomeintobeingontheearth?Astheearthcooleddownafteritexploded,watercameintobeing.,5.Whatsthesignificanceofthepresenceofwaterontheearth?Itallowedtheearthtodissolveharmfulgasesandacidsintotheoceansandseas.,6.Whatwasimportanttothedevelopmentoffish?oxygen.7.Whatmadepossibletheriseofmammalsontheearth?Thedisappearanceofdinosaursmadethepossibletheriseofmammalsontheearth.,8.Whyaremammalsdifferentfromalllifeformsinthepast?Theygavebirthtoyoungbabyanimalsandproducedmilktofeedthem.,FinishtheExercise2onthebookaccordingtothequestionsabove.,Closereading,I.Readthepassagecarefullyandmatchthemainideawitheachparagraph.,Para.1Theformation(形成)oftheearth.Para.2Theimportanceofwaterforlife.Para.3Awidelyacceptedtheoryabouttheformationoftheuniverse.Para.4Thearrivalofhumansandtheirimpactontheearth.Para.5Thedevelopmentofplantsandanimalsontheearth.,Stage1:Thedevelopmentoftheearth,(1)AftertheBigBang,whatwastheearthlike?,acloudofdust,asolidglobe,explodedwithfireandrock,producedwatervapourandgases,(2)Whathappenednext?,(3)Whatdidthewatervapourandgasesform?,theearthsatmosphere,Waterappeared,(4)Whatappearedastheearthcooleddown?,waterisimportantforthebeginningoflifeontheearth.,Whyiswatersoimportantforthebeginningoflife?Becausewaterallowedtheearthtodissolveharmfulgasesintooceansandseas.,？,Stage2Thedevelopmentoflife,smallplantsappearsinwater,1.Whatlifedevelopedafterwaterappeared?,Shellfishandallsortsoffish,2.Whatlifedevelopedinwaternext?,greenplantsbegantogrowonland,insectsappeared,3.Whataboutthelifeonland?,amphibiansonlandandinthewater,forests,4.Whatlifedevelopednextonland?,reptilesappeared,dinosaurdeveloped,5.Whatlifedevelopedafterforestsappeared?,mammalsonland,6.Whatlifedevelopedafterdinosaurs?,smallcleveranimals,7.Whatlifedevelopedaftermammals?,1.Whoarethesmallcleveranimalswithhandsandfeet?2.Aretheytakingcareoftheearthwell?Why?,?,Howlifebeganontheearth.,“BigBang”,otherbodies,_,stars,Earth:acloudof_,atoms,dust,Summary,asolid_,theearths_,other_,Water:_tothedevelopmentoflife,watervapour,nitrogen,carbon,extremelysmall_onthesurfaceofthewater,globe,gases,atmosphere,fundamental,plants,early_andallsortsoffish,greenplantsonland,landanimals,insects,amphibians,_,hugeanimals(dinosaurs),theriseof_,humanbeings,shellfish,reptiles,mammals,1.Insectsandamphibiansappeared.3.Theearthbecameasolidball.5.Reptilesappeared.7.Theearthwasacloudofdust9.Shellfishandotherfishappeared.11.Cleveranimalswithhandsandfeetappeared,2.Dinosaursappeared.4.Smallplantsgrewonthewater.6.Plantsbegantogrowondryland.8.Waterappearedontheearth10.Theuniversebeganwitha“BigBand”.12.Mammalsappeared.,8,3,10,9,11,5,1,7,4,12,6,2,Canyouputtheorderofdevelopmentoflifeintoatimeline?,Ex.2onP27,IV.True(T)orFalse(F).1.TheearthappearedbeforetheBigBanghappened.2.Theoriginalatmosphereconsistedofnitrogenandoxygen.3.Themaindifferencebetweentheearthandotherplanetsisthatthereiswaterontheearth.4.Lifebeganinwaterandthenonland.,F,F,T,T,5.Mammalsappearedbeforethedevelopmentofdinosaurs.6.Dinosaurscouldgivebirthtoyoungbabyanimalsandproducedmilktofeedthem.7.Humanbeingsproducetoomuchcarbondioxidewhichcausestheglo