高一英语 book3 unit3 how life began on the earth

人教课标版高一必修3Unit4,英语课件,ReadingHOWLIFEBEGANONTHEEARTH,Warmingup,Whatarethenamesoftheeightplanetsthatcircleoursun?,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,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,Prediction,Lookatthepicture.Doyouknowthetopicofthisunit?,海洋里的细胞开始分裂,登陆,爬行动物,恐龙,Mammals,人类的兴起,Doyouknowwhatitwaslikebeforelifeappearedonearth?,可以演化成低级生命的小液滴水泡状的太空原始生命体,Itwasfullofwater.,1.Whatdowemeanwhenwesaywearestudyingasubjectscientifically?Orwhatsthecorrectattitudetowardsscience?Weshouldbeobjective,notsuperstitious.,Answerthesequestions.,2.Whatsthecorrectwaytoproveascientificidea?Weshoulddesignexperimentstotestitforseveraltimes.Thenwecananalyzetheresultsanddrawaconclusionatlast.,3.Whatarethemostimportantskillsweneedtoberealscientists?Careful,objectiveandlogical,drawconclusionsfromtheexperimentsandnotimposeconclusionsonthedata.(imposeon把强加于),1.Theoriginoflifeonearthisaquestionthatinterestsastronomers.Whatdoyouknowaboutit?Howoldistheuniverse?(severalbillionyearsago)HowoldistheEarth?(between4.5and3.8millionyearsago)WhichwerethefirstcreaturesorplantsonEarth?.,Pre-reading,2.Eachreligionandculturehasitsownideasabouthowlifebeganonearth.Whatdoyouknow?InChina,weallknowthatPanguseparatestheskyfromtheearthandNvwamadehumans.,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.,TheBiblicalAccount,Day1:GodspokeandseparatedlightfromdarknesscreatingDayandNight.Day2:Godspokeandseparatedthewatercreatingskyandocean.Day3:Godspokeandcreateddryland.,Day4:Godspokeandcreatedthesun,moonandstars.Day5:Godspokeandcreatedlivingcreaturesintheairandsea.Day6:Godspokeandcreatedthelandanimalsandman.Day7:GodrestedandblessedthisdaycallingitHoly.,IndiaBrahmaisthegodfirstrepresentedintheHinduTriad.Heisthecreatoroftheuniverseandalllivingbeingsaresaidtohaveevolvedfromhim.,BigBang,Gas,Newstars,Dyingstars,remnants,平面图,太阳系,地球大气,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.,II.Answerthefollowingquestions.,1.Whywastheearthdifferentfromotherplanets?Thewaterremained.2.Whydidtheplantsgrowbeforetheanimalscame?Becauseplantsprovideoxygenforanimalstobreathe.,3.Whyisitwronginfilmsandstoriestoshowdinosaursandpeopletogether?Becausedinosaursdiedoutlongbeforehumanbeingsdevelopedontheearth.,4.Whydoyouthinkthathumansarethecleverestanimalsontheearth?Theyarethecleverestanimalsbecausetheyhavelargerbrainsthananyothercreatureontheearthsofar.,5.Thereusedtobenineplanetsinthesolarsystem.Recentlyscientistshavedecidedthatoneofthemcannolongerbeconsideredaplanet.Doyouknowthenameofthatplanet?Doyouknowwhytheyremovedit?Pluto.Scientistsnowthinkitistoosmalltobecalledaplanet.,6.Whatproblemiscausedbyhumanbeings?Theycauseglobalwarming.,III.Fillintheblanksinthefollowingform.,Atoms,violent,atmosphere,presence,acids,oxygen,shellfish,amphibians,Reptiles,existed,gavebirthto,clever,dioxide,IV.True(T)orFalse(F).1.TheearthappearedbeforetheBigBanghappened.2.Theoriginalatmosphereconsistedofnitrogenandoxygen.3.Themaindifferencebetweentheearthandotherplanetsisthatthereiswaterontheearth.4.Lifebeganinwaterandthenonland.,F,F,T,T,5.Mammalsappearedbeforethedevelopmentofdinosaurs.6.Dinosaurscouldgivebirthtoyoungbabyanimalsandproducedmilktofeedthem.7.Humanbeingsproducetoomuchcarbondioxidewhichcausestheglobalwarmingontheearth.8.Accordingtothetext,humanbeingswoulddisappearintheend.,F,F,T,F,Howlifebeganontheearth.,“BigBang”,otherbodies,_,stars,Earth:acloudof_,atoms,dust,Summary,asolid_,theearths_,other4._,Water:_tothedevelopmentoflife,watervapour,nitrogen,carbon,extremelysmall_onthesurfaceofthewater,globe,gases,a