高一英语人教版必修3第四单元阅读课件.ppt

,人教课标版高一必修3Unit4,ReadingHOWLIFEBEGANONTHEEARTH,Warmingup,Whatarethenamesoftheeightplanetsthatcircleoursun?,海王星Saturn,水星Uranus,金星Venus,地球Earth,火星Mars,木星Mercury,土星Jupiter,天王星Neptune,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,weallknowthatPanguseparatestheskyfromtheearth.,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。,Otherlegendsaboutthebeginningofuniverse,TheBiblicalAccount,Day1:GodspokeandseparatedlightfromdarknesscreatingDayandNightDay2:GodspokeandseparatedthewatercreatingskyandoceanDay3:Godspokeandcreateddryland,Day4:Godspokeandcreatedthesun,moonandstarsDay5:GodspokeandcreatedlivingcreaturesintheairandseaDay6:GodspokeandcreatedthelandanimalsandmanDay7:GodrestedandblessedthisdaycallingitHoly,IndiaBrahmaisthegodfirstrepresentedintheHinduTriad.Heisthecreatoroftheuniverseandalllivingbeingsaresaidtohaveevolvedfromhim.,BigBang,Gas,Newstars,Dyingstars,remnants,平面图,太阳系,地球大气,1.Whatwasthereontheearthbeforelifecouldbegin?Watervapour,carbondioxide,oxygen,nitrogenandothergases.,Scanning,2.Whydoscientiststhinktherehasneverbeenlifeonthemoon?Becausethereisnowateronthemoon.3.Whydidanimalsfirstappearintheseas?Becausewaterallowedtheearthtodissolveharmfulgasesintotheoceansandseas.,4.Whydidgreenplantshelplifetodevelop?Becausegreenplantscantakecarbondioxidefromtheatmosphereandfilltheairwithoxygen.,5.Whyweremammalsdifferentfromotheranimals?Theyweredifferentbecausetheyproducedtheiryoungfromwithintheirbodies.,Reading,I.Readthepassagecarefullyandmatchthemainideawitheachparagraph.,Para.1Theformation(形成)oftheearth.Para.2Theimportanceofwaterforlife.Para.3Awidelyacceptedtheoryabouttheformationoftheuniverse.Para.4Thearrivalofhumansandtheirimpactontheearth.Para.5Thedevelopmentofplantsandanimalsontheearth.,II.Readingandanswerthefollowingquestions.,1.Whywastheearthdifferentfromotherplanets?Thewaterremained.2.Whydidtheplantsgrowbeforetheanimalscame?Becauseplantsprovideoxygenforanimalstobreathe.,3.Whyisitwronginfilmsandstoriestoshowdinosaursandpeopletogether?Becausedinosaursdiedoutlongbeforehumanbeingsdevelopedontheearth.,4.Whydoyouthinkthathumansarethecleverestanimalsontheearth?Theyarethecleverestanimalsbecausetheyhavelargerbrainsthananyothercreatureontheearthsofar.,5.Thereusedtobenineplanetsinthesolarsystem.Recentlyscientistshavedecidedthatoneofthemcannolongerbeconsideredaplanet.Doyouknowthenameofthatplanet?Doyouknowwhytheyremovedit?Pluto.Scientistsnowthinkitistoosmalltobecalledaplanet.,6.Whatproblemiscausedbyhumanbeings?Theycauseglobalwarming.,III.Readthetextandfillintheblanksinthefollowingform.,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,Afterreading,asolid_,theearths_,other4._,Water:_tothedevelopmentoflife,watervapour,nitrogen,carbon,extremelysmall_onthesurfaceofthewater,globe,gases,atmosphere,fundamental,plants,early_andallsortsoffish,greenplantsonland,landanimals,insects,am