Unit 3 Writing -Presenting Ideas学案 高中英语外研版（2019）必修第三册

Unit3TheworldofscienceWritingandpresentingideas【学习目标】1.Readanexperimentreportandunderstandthestructureofanexperimentreport.2.Practiseanexperimentreportwiththehelpofthegivenstructure.3.Improveyourownabilityofwriting预习案【学习过程】Step1:自主学习回顾本单元话题探究案【合作探究】Homeworkchecking(4minutes)BenjaminFranklinwasoneoftheFoundingFathersoftheUnitedStates.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.Step1Activity5Readtheinstructionsfortheexperimentandanswerthequestions.(4minutes)1.Whatwilltheresultsofthisexperimentbe?2.Whatcanyoulearnfromthisexperiment?Step2Writinghelp(5minutes)1.Howtowriteanexperimentreport:①.Introduction:Introducetheaimoftheexperiment.②.Mainbody:Describethematerialsusedintheexperimentandexplaintheprocedure.③.Conclusion:Reporttheresultsandwhatyouhavelearnt.2.FillinthetableIntroductionTheaimoftheexperimentThisexperimentisdesignedtoa)______________________MainbodyThematerialsusedandtheprocedureIprepareb)_____________________________todothisexperimentProcedurec)______________________________________conclusionTheresultandwhatwehavelearnedAftertheexperiment,Icandrawtheconclusionthatd)____________________________________________Step3Discussion(10minutes)1.Answerthefollowingquestion.1).Whydoestheegggetpushedinsidethebottle?2).Writeareportoftheexperimentandshareitwiththeclass.Step4Fillintheblanks(5minutes)Theexperimentisdesignedtoprove1.________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.Step5writing(14minutes)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basin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,___________________________四、成形AnExperimentReport_____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Step6.Adiscussion(presentingideas)(3minutes)Chooseoneobjectandwriteashortpassagetodescribehowithaschangedandpredicthowitwillfurtherchangeoverthenext50years.Step7HomeworkChooseoneoftheobjectsinlastactivityoranobjectthatyouuseeveryday.Predicthowitwillfurtherchangeoverthenext50years.Makenotesaboutyouridea.Presentyourideastotheclass.Usethenotesinlastactivityandtheexpressions(onpage36)intheboxtohelpyouMyobjectis_____________________________.Howwillitchange_______________________.Whyitwillchange______________________.【参考答案】1.HomeworkcheckingThekey:1.from2.creative3.flew4.tired5.an6.bravery7.looking8.what9.actually10.beproved2.Step1Activity5Thekey:1.Aftertheeggissuckedintothemouthofthebottle,itisslowlyabsorbedintothebottleandfallstothebottom.2.Throughmyownexperience,Ihavelearnedthataslongaswestudyhard,observeandthinkcarefully,wecanfigureoutthesecretofsomescientificfacts.3.Step2WritinghelpThekey:a)figureoutwhytheboiledeggisswallowedbythehotglass.b)suchmaterialsasaboiledegg,aglassbottle(bottle-neckabitsmallerthantheegg)andhotwaterc)1.Removetheshelloftheegg.2.Carefullypoursomehotwaterintothebottle.3.Shakethebottlegently.4.Pourthehotwater.5.Quicklyputtheeggontopofthebottle.d)Aftertheexperiment,Icandrawtheconclusionthatitistruethataboiledeggcanbeswallowedbyahotglassbottleintherightexperiment.Throughthismyownexperience,Ihavelearnedthatsolongaswejuststudyhard,observeandthinkcarefully,wecanfigureoutthesecretofsomescientificknowledge.4.Step3Discussion1).Thekey:Theanswerisallaboutairpressure.Ifyoufirstsettheeggonanemptybottle,theairpressureinsidethebottlematchestheairpressureoutside,sonothinghappens.Butwhenyoupoursomehotwaterintothebottle,itcausestheairinsidetoheatupandexpandrapidly,sosomeoftheairinthebottlegetsout.Whentheeggisputonthebottle,theairpressureoutsideofthebottlepushestheeggintothebottle.Theresultisanunbalancedforce–theforceoftheairpushingontheeggfromoutsidethebottleisgreaterthantheforceoftheairpushinguponitfrominsidethebottle.Asaresult,theeggispushedintothe

bottle.2).Thisexperimentisdesignedtoprovewhetherairpressurereallyexists.Ipreparedthematerials,includingaboiledegg,aglassbottlewhoseneckisabitsmallerthantheegg,andsomehotwatertodothisexperiment.First,Iremovedtheshelloftheegg.Then,Icarefullypouredsomehotwaterintothebottle,andshookthebottlegently.Afterafewminutes,Ipouredoutthehotwater.Justatthesametime,Iquicklyplacedtheeggontopofthebottle.Aftertheexperiment,Icandrawtheconclusionthatairpressureindeedexists,anditisverypowerful.Itistheforceoftheairthatpushedtheeggintothebottl