人教版高中英语必修三unit4-reading课件.ppt

人教版高中英语必修三unit4-reading课件.ppt

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thescienceofthestarsUnit4AstronomyAstronomy?

AreyouinterestedinStep1Aquizonastronomy3.Earthistheonlyplanetmovingaroundthesun.Part1:

TrueorFalse1.Theearthmovesaroundthesun.TF2.Ittakestheearthonedaytomovearoundthesun.5.Thereisatmosphereonthemoon.4.Theearthistheonlyplanetinthesolarsystemwhichhaslivingcreatures.ayear8planetsnoFFTMercury水星Venus金星Earth地球Mars火星Jupiter木星Saturn土星Uranus天王星Neptune海王星1.DoyouknowhowtheuniversebeganaccordingtoChineseculture?

InChina,weallknowthatPanguseparatestheskyfromtheearth.LetsbrainstormthefollowingquestionsChineseLegends（传说传说）Panguseparatedtheskyfromtheearth.Hiswholebodythenturnedintoallkindsofthingsintheuniverse.盘盘古古开开天天辟辟地地2.Trytoputtherightorderofdevelopmentoflifeontheearth.Ifyouwanttoknowmore,pleaseturntoPage25Lookattitleandthepictures.Canyougetsomeinformationaboutwhatwewilllearnfromthetext?

Bigbang?

Theevolution（development）oflifeontheearth?

Thetextmaytellusthe_oftheearthandthe_oflifeonit.HowlifebeginontheearthPre-readingPre-readingFastreadingMatchthemainideawitheachparagraph.Para.1Theformation（形成形成）oftheearth.Para.2Theimportanceofwaterforlife.Para.3Awidelyacceptedtheoryabouttheformationoftheuniverse.Para.4Thearrivalofhumansandtheirimpactontheearth.Para.5Thedevelopmentofplantsandanimalsontheearth.CarefulreadingTaskone（para1）WhatisthewidelyacceptedtheoryinPara1?

TheuniversebeganwithaBigBangthatthrowmattersinalldirections.acloudof_BigBangasolid_slowlycombinetheearth_downitexplodedloudlywith_and_theearths_dustball/globefirerockatmospherecooledHowdidtheearthcomeintobeing（产生）?

Tasktwo（para2）Whyiswatersoimportantforthebeginningoflife?

paragraph3dissolveharmfulgasesandacidsintotheoceansandseas.BecausewaterallowedtheearthtoWhatlifedevelopedafterwaterappeared?

Paragraph4smallplantsgreenplantsforestearlyshellfishandallsortsoffishinsectsandamphibiansreptilesdinosaursmammalsAbout2.6millionyearsagoNowHumansproducetoomuchcarbondioxide,makingtheearthtoohottolivein.Para5Afterthecleveranimals（humans）becameimportantontheearth,whathappened?

Answerquestion1234567Letscheckwhetherweputtherightorderatfirst.Areyouright?

TaskthreePleasereadthetextagain,thenputtheorderofthesesentences.（exercise2,page27）InsectsandamphibiansappearedTheearthbecameasolidballReptilesappeared.Theearthwasacloudofdust.Shellfishandotherfishappeared.Cleveranimalswithhandsandfeetappeared.Dinosaursappeared.Smallplantsgrewonthewater.Plantsbegantogrewontheearth.Waterappearedontheearth.Theuniversebeginwitha“bigbang”Mammalsappeared.BigBang4.5-3.8billionmanymillionyearslater2.6millionNowTimeEventsBigBangdustsolidglobewaterappearssmallplantsshellfishandfishplantsgrowonthelandinsectsandamphibiansreptilesdinosaurmammalscleveranimalshumanslifeearthSumupThetextmaytellusthe_oftheearthandafter_appear,the_oflifeoneafteranotheronit.formationwaterdevelopmentInthelastparagraph,weknowhumansfaceseriouslyglobalwarmingproblem,whichisthreateningourexistence.Canyouwritesomethingtocallonustoprotectourenvironment?

DiscussionTheearthweliveinisbecomingmoreandmoreterrible,sowemusttakemeasurestodealwithitFirstly:

Secondly:

Thirdly:

Wehopetheenvironmentwillbecomemoreandmorebeautiful.SampleTheearthweliveinisbecomingmoreandmoreterrible,sowemusttakemeasurestodealwithitFirstly,thegovernmentshouldpasslawstopreventpeopleandfactoriesfrompollutingtheenvironment.Secondly,everyoneshouldrealizetheimportanceoftheproblemandtrytheirbesttoprotecttheenvironmentandfightagainstpollution.Besides,itsagoodideastoplanttreestoimprovetheenvironment.Wehopeourearthwillbecomemoreandmorebeautiful.例文例文1.Learnthenewwordsbyheart2.Listentotherecordingofthetext,andparaphrasethedifficultsentencesinthetext.Homework