人教版高中英語必修三unit4Reading課件

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ruohanxing1人教課標(biāo)高一必修3Unit423HOWLIFEBEGANONTHEEARTH4WarmingupWhatarethenamesoftheeightplanetsthatcircleoursun?5水星Mercury金星Venus地球Earth火星Mars木星Jupiter土星Saturn天王星Uranus海王星Neptun6

eAQuizGameHowoldistheearth?A.About3.5billionyearsB.About4.5billionyearsC.About5.5billionyearsD.About6.5billionyears

oftheearthsurfaceiscoveredbywater.A.20%B.30%C.50%D.70%7HowmanyplanetsarethereintheSolarSyste m?A.6B.7C.8D.9Whatisthetotalpopulationofhumansonthee arth?A.About3.5billionB.About4.5billionC.About5.5billionD.About6.5billion85.Howlongdoestherotation(自轉(zhuǎn))oftheearthtake?A.12hoursB.24hoursC.amonthD.365days6.Whichcontinentisthesmallest?A.AfricaB.NorthAmericaC.SouthAmericaD.Oceania7.OnwhatdayistheEarthdaycelebrated?A.April22B.May4C.August21D.November1198.Whichoceanisthelargest?A.ThePacificOceanB.TheArcticOceanC.TheIndianOceanD.TheAtlanticOcean9.Whichcountryhasthelargestarea?A.CanadaB.ChinaC.RussiaD.U.S.A10PredictionLookatthepicture.Doyouknowthetopicofthisunit?11海洋里的細胞開始分裂12登陸13爬行動物14恐龍1516Mammals1718人類的興起1920Doyouknowwhatitwaslikebeforelifeappearedonearth?21可以演化成低級生命的小液滴水泡狀的太空原始生命體22Itwasfullofwater.231.Whatdowemeanwhenwesaywearestudyingasubjectscientifically?Orwhat’sthecorrectattitudetowardsscience?Weshouldbeobjective,notsuperstitious.242.What’sthecorrectwaytoproveascientificidea?Weshoulddesignexperimentstotestitforseveraltimes.Thenwecananalyzetheresultsanddrawaconclusionatlast.253.Whatarethemostimportantskillsweneedtoberealscientists?Careful,objectiveandlogical,drawconclusionsfromtheexperimentsandnotimposeconclusionsonthedata.(impose…on…把……強加于……)261.Theoriginoflifeonearthisaquestionthatinterestsastronomers.Whatdoyouknowaboutit?Howoldistheuniverse?(severalbillionyearsago)HowoldistheEarth?(between4.5and3.8millionyearsago)WhichwerethefirstcreaturesorplantsonEarth?...27Pre-reading2.Eachreligionandculturehasitsownideasabouthowlifebeganonearth.Whatdoyouknow?28InChina,weallknowthatPanguseparatestheskyfromtheearthandNvwamadehumans.Panguseparatestheskyfromtheearth.29中國神話傳說中有盤古開天地的說法。巨人盤古用一把利斧劈開混沌,將天地分開。死后,他的氣息化成風(fēng)和云,聲音變成轟轟的雷聲,左眼化為太陽,右眼化為月亮,手足與四肢變成大地的四極與五方的名山,血液化成江河,筋脈鋪成道路,肌肉形成田地,須發(fā)成為星星,牙齒和骨骼化為金屬、珍珠、玉石,汗水成為滋潤萬物生長的甘霖和雨露。30Nvwamadehumans.31Otherlegendsaboutthebeginningofuniverse.32TheBiblicalAccount33Day1:GodspokeandseparatedlightfromdarknesscreatingDayandNight.Day2:Godspokeandseparatedthewatercreatingskyandocean.Day3:Godspokeandcreateddryland.Day4:Godspokeandcreatedthesun,moonandstars.Day5:Godspokeandcreatedlivingcreaturesintheairandsea.Day6:Godspokeandcreatedthelandanimalsandman.Day7:GodrestedandblessedthisdaycallingitHoly.34IndiaBrahmaisthegodfirstrepresentedintheHinduTriad.Heisthecreatoroftheuniverseandalllivingbeingsaresaidtohaveevolvedfromhim.35▲BigBangGasNewstarsDyingstarsremnants36平面圖373839太陽系40地球大氣41Scanning42Readthepassagequicklyandanswerthequestions.1.Whendidthe“BigBang”happen?Ithappenedseveralbillionyearsago.2.Whatformwastheearthafterthe“BigBang”?Theearthwasstilljustacloudofdust.3.Whatmadeuptheearth’satmosphereaftertheearthexploded?Carbon,nitrogen,watervapourandothergases.43Howdidwatercomeintobeingontheearth?Astheearthcooleddownafteritexploded,watercameintobeing.What’sthesignificanceofthepresenceofwater ontheearth?Itallowedtheearthtodissolveharmfulgasesandacidsintotheoceansandseas.446.Whatwasimportanttothedevelopmentoffish?oxygen.7.Whatmadepossibletheriseofmammalsontheearth?Thedisappearanceofdinosaursmadethepossibletheriseofmammalsontheearth.458.Whyaremammalsdifferentfromalllifeformsinthepast?Theygavebirthtoyoungbabyanimalsandproducedmilktofeedthem.46Carefulreading47I.Readthepassagecarefullyandmatchthemainideawitheachparagraph.Para.1Theformation(形成)oftheearth.Para.2Theimportanceofwaterforlife.Para.3Awidelyacceptedtheoryabouttheformationoftheuniverse.Para.4Thearrivalofhumansandtheirimpactontheearth.Para.5Thedevelopmentofplantsandanimalsontheearth.48II.Answerthefollowingquestions.491.Whywastheearthdifferentfromotherplanets?Thewaterremained.2.Whydidtheplantsgrowbeforetheanimalscame?Becauseplantsprovideoxygenforanimalstobreathe.3.Whyisitwronginfilmsandstoriestoshowdinosaursandpeopletogether?Becausedinosaursdiedoutlongbeforehumanbeingsdevelopedontheearth.504.Whydoyouthinkthathumansarethecleverestanimalsontheearth?Theyarethecleverestanimalsbecausetheyhavelargerbrainsthananyothercreatureontheearthsofar.515.Thereusedtobenineplanetsinthesolarsystem.Recentlyscientistshavedecidedthatoneofthemcannolongerbeconsideredaplanet.Doyouknowthenameofthatplanet?Doyouknowwhytheyremovedit?Pluto.Scientistsnowthinkitistoosmalltobecalledaplanet.526.Whatproblemiscausedbyhumanbeings?Theycauseglobalwarming.53III.Fillintheblanksinthefollowingform.54TimeWhathappenedBigBang_Atoms

begantoformandcombinetocreatestarsandotherbodies.earsago55Between4.5a

●Dustsettledintoasolidandnd3.8billiony

v_i_oglelonbte.Theearthexplodedtoproduceits

atmosp.

hereThecontinued

ofwpraetesernalcleowedtheearthtodi

ssolveharmfulgasesand

intotheoceansandseas.acidsManymilliThefirstsmallplantsonthesuonsofyearslaterrfaceofthewaterproduced

.

oxygenEarly

shellfi_sahndallsortsoffishappeared.Greenplantsbegantogrowonland.Insectsand

amphibia_nasppeared.56Manymillionso

Re_p_tilesappearedanfyearslaterdtheylaideggs.Dinosaursdeveloped,laideggsand

formor

etxhiasnte1d40millionyears.Mammalsroseand_gave_b_irth_tboabies.57About2.6millionyearsagoSomesmall

clevaenri

malswithhandsandfeetappearedandspreadallovertheearth.NowHumansproducetoomuchcarbon

,makingtheearthtoohdoiot.xide58IV.True(T)orFalse(F).1.TheearthappearedbeforetheBigBangh59appened.2.Theoriginalatmosphereconsistedofnitrogenandoxygen.3.ThemaindifferencebetweentheearthandotherplanetsisthatthereiswaterontheFFearth.

T4.Lifebeganinwaterandthenonland.TDinosaurscouldgivebirthtoyoungbabya nimalsandproducedmilktofeedthem.Humanbeingsproducetoomuchcarbond ioxidewhichcausestheglobalwarmingontheearth.8.Accordingtothetext,humanbeingswoulddisappearintheend.5.MammalsappearedbeforethedeveFlopme

ntofdinosaurs.FTF60Howlifebeganontheearth.“BigBang”otherbodiesstars

atomsEarth:acloudof

dustSummary61watervapournitrogencarbonasolid

glob