最新高一英语 book3 unit3 how life began on the earth知识分享.ppt

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1、ReadingHOWLIFEBEGANONTHEEARTHWarmingupWhatarethenamesoftheeightplanetsthatcircleoursun?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UranusAQuizGame1.Howoldistheearth?A.About3.5billionyearsB.About4.5billionyearsC.About5.5billionyearsD.About6.5bil

2、lionyears2.______oftheearthsurfaceiscoveredbywater.A.20%B.30%C.50%D.70%3.HowmanyplanetsarethereintheSolarSystem?A.6B.7C.8D.94.Whatisthetotalpopulationofhumansontheearth?A.About3.5billionB.About4.5billionC.About5.5billionD.About6.5billion5.Howlongdoestherotati

3、on(自转)oftheearthtake?A.12hoursB.24hoursC.amonthD.365days6.Whichcontinentisthesmallest?A.AfricaB.NorthAmericaC.SouthAmericaD.Oceania7.OnwhatdayistheEarthdaycelebrated?A.April22B.May4C.August21D.November118.Whichoceanisthelargest?A.ThePacificOceanB.TheArcticOce

4、anC.TheIndianOceanD.TheAtlanticOcean9.Whichcountryhasthelargestarea?A.CanadaB.ChinaC.RussiaD.U.S.APredictionLookatthepicture.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Itwa

5、sfullofwater.1.Whatdowemeanwhenwesaywearestudyingasubjectscientifically?Orwhat’sthecorrectattitudetowardsscience?Weshouldbeobjective,notsuperstitious.Answerthesequestions.2.What’sthecorrectwaytoproveascientificidea?Weshoulddesignexperimentstotestitforseveralt

6、imes.Thenwecananalyzetheresultsanddrawaconclusionatlast.3.Whatarethemostimportantskillsweneedtoberealscientists?Careful,objectiveandlogical,drawconclusionsfromtheexperimentsandnotimposeconclusionsonthedata.(impose…on…把…强加于…)1.Theoriginoflifeonearthisaquestion

7、thatinterestsastronomers.Whatdoyouknowaboutit?Howoldistheuniverse?(severalbillionyearsago)HowoldistheEarth?(between4.5and3.8millionyearsago)WhichwerethefirstcreaturesorplantsonEarth?...Pre-reading2.Eachreligionandculturehasitsownideasabouthowlifebeganonearth.

8、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