Unit 2 Great ideas Listening 课件 沪教版（新教材）九年级上册

Unit2Greatideas

KeyquestionHowdogreatideaschangetheworld?主题范畴：人与社会主题群：历史、社会与文化；科学与技术子主题：对世界、国家、人民和社会进步有突出贡献的人物。(1)knowaboutBenjaminFranklinandhisfamouskiteexperimentonlightning.(2)masterkeywordsandunderstandhowthelightningrodwasinvented.(3)improvelisteningskillstogetkeyinformationandfinishrelatedexercises.Learningobjectives学习目标Afterlearning,Iwillbeableto:Newwordsandphrases1.*wire/ˈwaɪə(r)/ n.

金属丝；电线 p.242.prove/pruːv/ v.

证明；证实 p.243.lightningrod 避雷针 p.24Lead-inLookatthepicturesInrainythunderstorms,lightningmayhitbuildingsandcausefires.Butmanytallbuildingsaresafenow.Doyouknowwhatprotectsthem?lightningrodWherecanweseelightningrods?(onthetop,tallbuildings,houses,towers.)Whatarethelightningrodsmadeof?(metal/copperoriron)What’stheuseoflightningrods?(protectbuildingsfromlightning)Let’sdiscussWorkingroupsandtalkaboutthefollowingquestions.Doyouknowwhoinventedthelightningrod?Howwasitinvented?Tips:Studythequestionsandnotesbefore

youlisten.Marksomekeywords.Predictpossibleanswers.Whatdogreatideasbringabout?Think

伟大的想法能带来什么？Pre-listeningAbrilliantideaYoumayseelightningrodsindifferentplaces.Butdoyouknowhowlightningrodswereinvented?Lookatthepicturebelowanddiscusstheexperimentinpairs.P24Lookanddiscuss丝绸风筝金属丝/ˈhempstrɪŋ/麻绳金属钥匙丝线Lookatthepictureandthink:①WhatdidFranklinusefortheexperiment？②Whatdidhewanttoprovewiththeexperiment?①Asilkkite,ametalwire,ahempstring,ametalkeyandasilkstring.②Hewantedtoprovethatlightningwasakindofelectricity.Listentothestoryandanswerthequestionsbelow.While-listeningP24Listenandanswer(1)WhowasBenjaminFranklin?(2)Accordingtothespeaker,whathelpedBenjaminFranklinsolvedifferentproblems?(1)WhowasBenjaminFranklin?(2)Accordingtothespeaker,whathelpedBenjaminFranklinsolvedifferentproblems?HewasanAmericanscientistandinventorinthe18thcentury.Whathelpedhimwasthathewasalwaysverycuriousabouttheworld./Hiscuriosity.Listenagainandfillintheblanks.ListenandfillP24hitbuildingsflyakiteduringlightningwaselectricityLightningrodssavebuildingsfrombeingdestroyedbyfireinventedthelightningrodathunderstormDiscussandshareP24Discussthequestionbelow.HowdidBenjaminFranklincomeupwithsuchabrilliantidea?Hewascuriousaboutnature.Hesawlightningdamagedbuildings.Helovedscienceandobservednaturecarefully.Hethoughthard,thencameupwiththeexperimentidea.Hedaredtodoexperimentstofindthetruth....SomepossiblepointsTapescriptPost-listeningBenjaminFranklinwasanAmericanscientistandinventorinthe18thcentury.Hewasalwaysverycuriousabouttheworld,andthisoftenhelpedhimsolvedifferentproblems.Backinthosedays,lightningoftenhitbuildingsduringthunderstorms.Thereweremanyterriblefires,andtheworstfirescouldburnwholetownstotheground.Franklinwantedtopreventsuchthings.Hebelievedthatlightningwasactuallyelectricity,sohedecidedtoflyakiteduringathunderstormtoseeifhewasright.Hemadeasilkkitewithametalwireontop.Thenheattachedahempstringtothebottompartofthekite.Whenthehempstringgotwet,itcouldconductelectricity.Franklinalsoattachedametalkeyandasilkstringtothehempstring.OnedayinJune1752,athunderstormwascomingin,soFranklinandhissonwentoutwiththekite.Theyflewithighinthesky.Thentheywalkedinsideafarmbuilding.However,theyleftthedooropensothekitecouldcontinueflying.Thatway,theykeptthesilkstringdry.Thiswasveryimportant—theydidn'twanttogethitbylightning.Franklinwaspullingonthestringanxiouslywhenlightningflashednearthekite.Heputhishandclosetothekeyandfeltanelectricshock."I'vebeenshocked!Success!Success!"heshoutedtohisson.Franklin'sexperimentwasverydangerous.Nooneshouldevertryittoday.Infact,Franklinwasluckythatthekitewasn'thitbylightning.Itwouldhavekilledhim.However,itdidleadtooneofFranklin'sinventions—thelightningrod.InFranklin'sday,lightningrodssavedbuildingsfrombeingdestroyedbyfire.Theycontinuetoprotectbuildingstoday.1.wire

/ˈwaɪə(r)/ n.金属丝；电线如：这根细电线连接电灯和电源。Thisthinwireconnectsthelamptothepower.【拓展】wire v.

接线；布线→wireahouse给房子布线wirelessadj.

无线的→wirelessWiFi无线网络2.prove/pruːv/ v.证明；证实①prove＋n.证明某事如：他想要在比赛中证明自己的能力。Hewantstoprovehisabilityinthecompetition.②provetobe+adj./n.事实证明；原来是如：这项任务比我们预想的更难。Thetaskprovedtobemoredifficultthanwethought.如：这张照片证明他当天在现场。Thephotoprovesthathewasatthescenethatday.③prove+that从句注意：其过去式/过去分词：‌prove的过去式是proved‌，‌过去分词通常是proven，也可以写成proved。‌3.lightningrod

避雷针如：高层建