人教版高中英语必修三unit4-reading(公开课).ppt

,thescienceofthestars,Unit4Astronomy,Astronomy?,Areyouinterestedin,Step1,Aquizonastronomy,3.Earthistheonlyplanetmovingaroundthesun.,Part1:TrueorFalse,Theearthmovesaroundthesun.,T,F,2.Ittakestheearthonedaytomovearoundthesun.,4.Thereisatmosphereonthemoon.,5.Theearthistheonlyplanetinthesolarsystemwhichhaslivingcreatures.,ayear,8planets,no,F,F,T,Mercury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,Doyouknowhowtheuniversebeganaccordingtochineseculture?InChina,weallknowthatPanguseparatestheskyfromtheearth.,Letsbrainstormthefollowingquestions,ChineseLegends(传说),Panguseparatedtheskyfromtheearth.Hiswholebodythenturnedintoallkindsofthingsintheuniverse.,盘古开天辟地,2.Trytoputtherightorderofdevelopmentoflifeontheearth?Ifyouwanttoknowmore,pleaseturntoPage25,Lookattitleandthepictures.Canyougetsomeinformationaboutwhatwewilllearnfromthetext?,Bigbang?,Theevolution(development)oflifeontheearth?,Thetextmaytellusthe_oftheearthandthe_oflifeonit.,Howlifebeginontheearth,Pre-reading,Pre-reading,HowlifebeganontheEarth,Fastreading,Matchthemainideawitheachparagraphy.,Para.1Theformation(形成)oftheearth.Para.2Theimportanceofwaterforlife.Para.3Awidelyacceptedtheoryabouttheformationoftheuniverse.Para.4Thearrivalofhumansandtheirimpactontheearth.Para.5Thedevelopmentofplantsandanimalsontheearth.,Carefulreading,Taskone(para1),WhatisthewidelyacceptedtheoryinPara1?,TheuniversebeganwithaBigBangthatthrowmatters.bodies.,acloudof_,BigBang,asolid_,slowlycombine,theearth_down,itexplodedloudlywith_and_,theearths_,dust,ball/globe,firerock,atmosphere,cooled,Howdidtheearthcomeintobeing(产生）?,Tasktwo(para2),Whyiswatersoimportantforthebeginningoflife?,？,paragraph3,dissolveharmfulgasesandacidsintotheoceansandseas.,Becausewaterallowedtheearthto,Whatlifedevelopedafterwaterappeared?,Paragraph4,smallplants,greenplants,forest,earlyshellfishandallsortsoffish,insectsandamphibians,reptiles,dinosaurs,mammals,About2.6millionyearsago,Now,Humansproducetoomuchcarbondioxide,makingtheearthtoohottolivein.,Para5,Afterthecleveranimals(humans)becameimportantontheearth,whathappened?,Answerquestion,1,2,3,4,5,6,7,Letscheckwhetherweputtherightorderatfirst.Areyouright?,Taskthree,Pleasereadthetextagain,thenputtheorderofthesesentences.(exercise2,page27),InsectsandamphibiansappearedTheearthbecameasolidballReptilesappeared.Theearthwasacloudofdust.Shellfishandotherfishappeared.Cleveranimalswithhandsandfeetappeared.,Dinosaursappeared.Smallplantsgrewonthewater.Plantsbegantogrewontheearth.Waterappearedontheearth.Theuniversebeginwitha“bigbang”Mammalsappeared.,BigBang,4.5-3.8billion,manymillionyearslater,2.6million,Now,Time,Events,BigBang,dust,solidglobe,waterappears,smallplants,shellfishandfish,plantsgrowontheland,insectsandamphibians,reptiles,dinosaur,mammals,cleveranimals,humans,life,earth,Sumup,Thetextmaytellusthe_oftheearthandafter_appear,the_oflifeoneafteranotheronit.,formation,water,development,Inthelastparagraph,weknowhumansfaceseriouslyglobalwarmingproblem,whichisthreateningourexistence.Canyouwritesomethingtocallonustoprotectourenvironment?,Discussion,Theearthweliveinisbecomingmoreandmoreterrible,sowemusttakemeasurestodealwithitFirstly:Secondly:Thirdly:Wehopetheenvironmentwillbecomemoreandmorebeautiful.,Sample,Theearthweliveinisbecomingmoreandmoreterrible,sowemusttakemeasurestodealwithitFirstly,thegovernmentshouldpasslawstopreventpeopleandfactoriesfrompollutingtheenvironment.Secondly,everyoneshouldrealizetheimportanceoftheproblemandtrytheirbesttoprotecttheenvironmentandfightagainstpollution.Besides,itsagoodideastoplanttree