英语:高一下Unit16 Scientists at work-Reading课件4(旧人教版).ppt

英语:高一下Unit16 Scientists at work-Reading课件4(旧人教版).ppt

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1、Franklin'sFamousKiteExperimentFranklin'sFamousKiteExperimentAbriefintroductionofFranklinBenjaminFranklin(1706~1790)1.In1752scientistsalreadyknewwhatelectricitywas.2.Franklinwashelpedbyafriendtodotheexperiment.3.Franklinmadethekiteofsilkbecausewetsilkdoesnotconductelectricity4.Acondenserwasusedin

2、theexperimenttostoreelectricity.5.Thekeytiedtothestringwasputintothedoortostopthekitefromflyingaway.TrueorFalse:FFTFTQuestionsWhydidFranklindothisexperiment?Whathappenedduringtheexperiment?What’stheresultsoftheexperiment?Whatdoweneedtodotheexperiment?Howcanyoumakeakite?Whyisitbettertomakethekite

3、ofsilkthanofpaper?Whatarethenextthreestepsafteryoumakeakite?Whatshouldbepaidattentiontowhenitwasbeingdone?Howcanwemakeakite?_____the_______ofthekitebymakingasmallcrossoftwopiecesof___________.Thepiecesshouldbejustlongenoughto_____thecornersofthehandkerchief.___thecornersofthehandkerchief___thepo

4、intsofthecross.____atail___theframeand___alongstring____thecrosssothatyoucan______thekite.BuildframelightwoodreachTietoAddtotietocontrolpaperwoodensticksstringkiteThenextthreestepsareveryimportant.First,___averysharppieceof______,pointingafootormore.Second,_______akeytotheendofthelongstring.Thir

5、d,____asilkribbon___thestring,justabovethekey.Thisribbonwhichmustnot________,will________you_____theelectricity.fixmetalfastentietogetwetprotectfromstringsharpmetalkeykitewoodenstickssilkribbonCondenserInstructionsAsmallcrossoftwopiecesoflightwood.Tiethecornersofahandkerchieftothepointsofthecros

6、s.Addatailtotheframe.Tiealongstringtothecross.Fixasharppieceofmetaltothetopofthelongerstickofthecross.Fastenakeytotheendofthelongstring.Tieasilkribbontothestring.Connectacondensertotheendofthestring.Themakingprocess(过程)Introductionoftheexperiment.TheprocessoftheexperimentTipsofdoingtheexperiment

7、Para1Para2-3Para4-6MainideaDiscussionDoyouthinkFranklin’sexperimentdangerous?Why?WhatcanyoulearnfromFranklin?Title:Experimenter’sname:Purpose:Materials:(1)Situation:Procedure(过程):Results:KiteexperimentBenjaminFranklinShowtha

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