高一人教修订版下Unit 16 Scientists at work课件.ppt

Unit16ScientistsAtWork,Thesecondperiod,ColumnAColumnBAlexanderBelltheTheoryofRelativityThomasEdisonthefirsttelephoneLaitebrotherstheelectriclampMadamCurieblackholesinUniverseFranklinthefirstplaneStevenHawkingtheTheoryofGravityElbertEinsteinRadiumIsaacNewtonelectricity,Usefulexpressions:1.betodosth:should/mustdo,plantodo2.advantage:n.“优势,有利条件”havetheadvantageoftakeadvantageof3.thefirst+n.todosth4.ahigh-speedmaglevtrain5.nuclearenergynuclearpowerstation6.awaste(n)ofmoney/timewaste(v)time/moneyonsth/(in)hefuture8.make(good/full)useof,Benjamin.Franklin,DoyouknowwhoIam?,Benjamin.Franklin(1706-1790),diplomat（外交官）statesman（政治家）philosopher（哲学家）inventorscientist,BenjaminsGreatinvention,Lightningrod,Theoriginalone,Benjamin.Franklinandhissayings,Timeismoney.Earlytobedandearlytorise,makesamanhealthy,wealthy,andwise.Welldoneisbetterthanwellsaid.,Whatistherelationshipbetweenlightningandelectricity,Fastreading:,Twotasks:1.WhydidBenjaminFranklindothisexperiment?2.Matchthemainideaswiththeparagraphs.,WhydidBenjaminFranklindothisexperiment?,Hewantedtoprovethatlightningandelectricityarethesame.,Themainideaofeachpart.Matchthemwitheachother.,Part1(Para.1)Part2(Para.2-3)Part3(Para.4-6),TheprocessoftheexperimentThetipsofdoingtheexperimentIntroductionofFranklinsexperiment,ReadPara2-3carefully,thentrytocompletethesciencereport.,KiteExperiment,Franklinandhisson,Lightningandelectricityarethesame.,InJune,1752,Name:Time:Weather:People:Results:,rainy,stormy,windy,ReadPara4-5carefully,thentrytofinishthefollowingtasks.,Task1:WhatareneededtodoFranklinskiteexperiment?Task2:WhatarethefunctionsofdifferentthingsforFranklinskiteexperiment?,Kiteexperiment,BadWeather,SilkKite,WhatareneededtodoFranklinskiteexperiment?,condenser,Key,Whatsakiteusuallymadeof?,paper,woodensticks,string,kite,WhatsFranklinskitefortheexperimentmadeof?(Para4-5),string,sharpmetal,key,kite,silkhandker-chief,woodensticks,silkribbon,toattractelectricity,1.buildtheframebymakingasmallcross,2.tiethecornerstothepointsofthecross,3.addatailtotheframe,4.tiealongstringtothecross,5.fixasharppieceofmetaltothetopofthelongerstick,6.fastenakeytotheendofthelongstring,7.tieasilkribbontothestringabovethekey,asharppieceofmetal,onefootormore,Longstring,cross,tail,Silkribbon,key,Summary,woodensticks,Kiteexperiment,Silkhandkerchief,silkribbon,key,asharppieceofmetal,string,kite,condenser,shed,badweather,asilkkite,badweather,akey,acondenser,Attractlightning:Lastlonger,todirectelectricitytowardsthecondenser,tocollectandstoreelectricity,tohavelightning,tokeephimselfandhistoolsdrysothathehimselfwouldnotbehitbythelightning,ashed,FranklinsFamousKiteExperiment,woodensticks,Tobuildtheframeofthekitebymakingasmallcross,tocontrolthekitebytyingalongstringtothecross,astring,asharppieceofmetal,topulltheelectricityfromthethundercloud,asilkribbon,tostopthekitefromflyingawaywithouttouchingthechargedstring,Yes,verydangerous.Becauseifsomethingwentwrong,hecouldbekilledbythelightning.,Para.6ExperimentTipsforSafety,Standinsideadoor,orundersomecover.,Dontletthestringtouchthewallordoor.,Mustnotgetthesilkribbonwet.,TrueorFalse:In1752scientistsalreadyknewwhatelectricityis.Franklinwashelpedbyafriendtodotheexperiment.3.Franklinmadethekiteofsilkbecausewetsilkdoesnotconductelectricity.,T,F,F,Post-reading,hisson,willnottearsosooninweatherwithrainandwinds,4.Acondenserwasusedintheexperimenttostoreelectricity.,T,5.Thekeytiedtothestringwasputintothedoortostopthekitefromflyingaway.,F,todirecttheelectricitytothecondenser.,6.Theexperimentcanbedoneatanytime.7.Youcanfeelaclearelectronicshockifyoutouchthestringw