外研版高中英语必修三 （The world of science）新课件(第3课时)

第3课时Unit3

Theworldofscience

1.Readanexperimentreportandunderstandthestructureofanexperimentreport.2.Practiseanexperimentreportwiththehelpofthegivenstructure.3.ImproveyourownabilityofwritingGoalsBenjaminFranklinwasoneoftheFoundingFathersoftheUnitedStates.Apart1._____beingasuccessfulstatements,hewasalsoa2._______(create)scientistaninventor.BenjaminFranklin3.________(fly)akiteduringastormin1752.heraisedthekitewithapieceofsting4.______(tire)toit.Ametalkeywasattachedtithesting.Aflashoflightinghitthekite,andelectricitywasconductedthroughthestingtothekey.Franklinthentouchedthekeyandgot5.________electricshock.Generationsofschoolchildrenhavebeenamazedbyhis6.___________(brave)andscientificapproachto7.________(look)forthetruth.However,newresearchsuggeststhatthestorymaybefictioninsteadofafact.Morethanonescientisthasquestioned8._______reallyhappened.TheyallagreedthatifFranklinhad9.___________(actual)touchedthekey,hewouldcertainlyhavediedfromelectricshock.Inscience,factsshould10.________(prove)byexperimentsandresearch,andweshouldnotalwaysbelieveeverythingwereadorhear--evenifitisagreatstory.HomeworkcheckingfromcreativeflewtiredanbraverylookingwhatactuallybeprovedReadtheinstructions(onpage35)fortheexperimentandanswerthequestions.2.Whatcanyoulearnfromthisexperiment?1.Whatwilltheresultsofthisexperimentbe?Aftertheeggissuckedintothemouthofthebottle,itisslowlyabsorbedintothebottleandfallstothebottom.Throughmyownexperience,Ihavelearnedthataslongaswestudyhard,observeandthinkcarefully,wecanfigureoutthesecretofsomescientificfacts.WritinghelpHowtowriteanexperimentreport:①.Introduction:②.Mainbody:③.Conclusion:Introducetheaimoftheexperiment.Describethematerialsusedintheexperimentandexplaintheprocedure.Reporttheresultsandwhatyouhavelearnt.FillinthetableIntroductionMainbodyconclusionTheaimoftheexperimentThematerialsusedandtheprocedureTheresultandwhatwehavelearnedThisexperimentisdesignedtoa)______________________Iprepareb)____________________________________________________todothisexperimentProcedurec)_________________________________________________________________________________________________________________________________________________________________________________________________________________Aftertheexperiment,Icandrawtheconclusionthatd)figureoutwhytheboiledeggisswallowedbythehotglass.suchmaterialsasaboiledegg,aglassbottleandhotwater1)Removetheshelloftheegg.2)Carefullypoursomehotwaterintothebottle.3)Shakethebottlegently.4)Pourthehotwater.5)Quicklyputtheeggontopofthebottle.Aftertheexperiment,Icandrawtheconclusionthatitistruethataboiledeggcanbeswallowedbyahotglassbottleintherightexperiment.Throughthismyownexperience,Ihavelearnedthatsolongaswejuststudyhard,observeandthinkcarefully,wecanfigureoutthesecretofsomescientificknowledge.Theanswerisallaboutairpressure.Ifyoufirstsettheeggonanemptybottle,theairpressureinsidethebottlematchestheairpressureoutside,sonothinghappens.Butwhenyoupoursomehotwaterintothebottle,itcausestheairinsidetoheatupandexpandrapidly,sosomeoftheairinthebottlegetsout.Whentheeggisputonthebottle,theairpressureoutsideofthebottlepushestheeggintothebottle.Theresultisanunbalancedforce–theforceoftheairpushingontheeggfromoutsidethebottleisgreaterthantheforceoftheairpushinguponitfrominsidethebottle.Asaresult,theeggispushedintothe

bottle.Whydoestheegggetpushedinsidethebottle?DiscussionThisexperimentisdesignedtoprovewhetherairpressurereallyexists.Ipreparedthematerials,includingaboiledegg,aglassbottlewhoseneckisabitsmallerthantheegg,andsomehotwatertodothisexperiment.First,Iremovedtheshelloftheegg.Then,Icarefullypouredsomehotwaterintothebottle,andshookthebottlegently.Afterafewminutes,Ipouredoutthehotwater.Justatthesametime,Iquicklyplacedtheeggontopofthebottle.Aftertheexperiment,Icandrawtheconclusionthatairpressureindeedexists,anditisverypowerful.Itistheforceoftheairthatpushedtheeggintothebottle.WriteareportoftheexperimentandshareitwiththeclassTheexperimentisdesignedtoprove1.________airpressurereallyexists.Atthebeginningoftheexperiment,Ipreparedthematerials,2._________(include)aboiledegg,aglassbottle3.______neckisabitsmallerthantheegg,andsomehotwater.Withallthethings4.________(prepare),theexperimentbegan.First,Iremovedtheshelloftheegg.Then,I5.________(careful)pouredsomehotwaterintothebottle,and6.________(shake)thebottlegently.Afterafewminutes,Ipouredoutthehotwater.Justatthesametime,Iquicklyplaced7.______eggontopofthebottle.Tomy8.__________(amaze),theeggsqueezedintothebottleatonce.9._______theexperiment,Icandrawtheconclusion10.______airpressureindeedexists,anditisverypowerful.Itistheforceoftheairthatpushedtheeggintothebottle.FillintheblankswhetherincludingwhosepreparedcarefullyshooktheamazementAfterthat假如今天在物理老师的帮助下,你们做了一个有趣的实验。请根据以下实验步骤,用英语写一篇80词左右的短文。1.准备一支蜡烛、一个盆和一些水,一个比蜡烛稍高些的玻璃杯。2.将蜡烛置于盆底,并向盆中倒入一些水。3.点燃蜡烛,将玻璃杯罩在蜡烛上。4.当蜡烛熄灭后,看到玻璃杯中水面高于盆中水面。参考词汇:盆basinWriting一.审题1.确定体裁:本单元的写作是实验报告,属于说明文。按照实验报告的格式,写作内容包括五个方面:Aim实验目的;Apparatus实验器材;Method实验步骤;Result实验结果;Conclusion实验结论。2.确定人称:本文的主要人称为第一人称。3.确定时态:时态以一般现在时为主,对实验过程的描述可用一般过去时。二.谋篇就本篇习作而言,我们可以把全文分为三部分。第一部分:说明实验的来源(课上物理老师做的实验);第二部分:说明实验的器材、实验步骤;第三部分:说明实验结果并进行评价。三.框架Today,wecarriedout_______________Beforewestarted,weprepared___________________Toourastonishment,___________________________AnExperimentReportToday,withthehelpofourphysicsteacher,wecarriedoutaninterestingexperimentincl