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Pre-reading1.Doyouknowthenamesofsomefamousscientists?Whataretheyfamousfor?2.Inthe18thand19thcenturiesscientistsallovertheworldmademanyimportantdiscoveries.Canyounamesomeofthem?3.Whyarethesediscoveriesimportant?4.Canyoudescribeascienceexperimentthatyoudid?Wasitsuccessful?Whatdidyoulearnfromit?Discussthefollowingquestions:SomeFamousScientistsArchimedesMathematicsphysicsDiscoveredpi(∏)CharlesDarwinbiologyDiscoveredtheancestorsofpeopleweremonkeysMadameCuriephysicsDiscoveredradiumandradioactivityIsaacNewtonphysicsDiscoveredwhyallthingsfalldowntoearthJohnSnowmedicineDiscoveredhowdiseasesspreadScienceReport:KiteExperimentAimsMaterialsInstructionsDescriptionResultsToshowthatlightningandelectricityarethesame.Somewoodensticks,apieceofsilk,somestring,averysharppieceofmetal,asilkribbon,akey,acondenser,asmallshed,athunderstormwithlightning.Paragraphs5and6.Paragraph3.Theelectricitystoredinthecondensercanbeusedtodootherexperiments,whichprovesthatlightningandelectricityarethesame.HowdidFranklinusehiscreativitytoovercomevariousproblemsforhisexperiment?1Wecannotgoandlookforlightning,soFranklinhastofindawaytomakelightningcometohim:heattractedlightningusingakite.2Akitemadeofpaperwon’tlastlonginrainyweather,sohehastomakeastrongkite:hemadehiskiteofsilk.3Asilkkitedoesn’tattractlightning,sohehadtoaddsomething:hefixedalong,sharppieceofmetaltothetopoflongeststickofthecross.4Hehadtocollectandstoretheelectricity,sothathecouldlateruseitinotherexperiments:hebroughtacondenser.5Hehadtomakesurethathehimselfwouldnotbehitbythelightning,sohehadtofindalowplacewherehecouldkeephimselfandhistoolsdry:heusedasmallshedinthefields.6Hehadtostopthekitefromflyingaway,withouttouchingthestringthatwouldbechargedwithelectricity:hetiedasilkribbontothestringthathekeptdrybystandinginsidetheshed.Drysilkdoesn’tconductelectricity,soitwassafetoholditinhishands.7Hehadtodirecttheelectricitytowardsthecondenser,withapieceofmetalattheendofthestring:hetiedametalkeytotheendofthestring.RetellingthestoryRefertotheformofthescienceReportofFranklin’skite,trytoretellthestoryInordertoshowthatlightningandelectricityarethesame,BenjaminFranklinbuiltastrongkite.Whenthebadweathercame,hedidhisexperimentbyusinghiskiteandcondenser.Hefoundthatthestringwasgettingchargedandhecouldfeelalightbutveryclearelectricshock.Sohestoredagreatdealofelectricityinthecondenser.Thisexperimentprovedhisidea.Todothisexperiment,fourfactorsareneeded:akite,akey,somereallybadweatherandacondenser.Inthemeanwhile,thenextthreestepsareveryimportant.First,fixaverysharppieceofmetal.Second,fastenakeytotheendofthelongstring.Third,tieasilkribbontothestring.Post-reading1.Readthestatementsonpage25anddecidewhethertheyaretrueorfalse.2.Answerthequestionsonpage25.1Hewantedtoprovethatlightningandelectricityarethesamething.2Asilkkitewilllastlongerinbadweatherthanapaperkite.3Yes.Franklin’sexperimentwasverydangerousbecauseifsomethingwentwronghecouldbekilledbythelightning.SuggestedAnswers: