Unit+3+The+world+of+Science+Presenting+ideas+课件【知识精讲精研】高中英语外研版（2019）必修第三册

Unit3TheWorldofScience第1课时Todiscusshowsomeinventionshavechangedovertheyearsandtopredicthowtheywillfurtherchangeoverthenext50years.Lookatthepicturesanddiscusshowtheseobjectshavechangedovertheyears.RecorderTelephoneComputerChooseoneoftheobjectsinActivity1oranobjectthatyouuseeveryday.Predicthowitwillfurtherchangeoverthenext50years.Makenotesaboutyourideas.Myobject:__________________________________Howitwillchange:__________________________________Whyitwillchange:__________________________________Presentyourideastotheclass.UsethenotesinActivity2andtheexpressionsintheboxtohelpyou.Itwillbecome…Peoplewilluse…insteadof…Itwillbe…forpeopleto…Therewillbeno…because…UsefulexpressionsAftercompletingthisunit,Icanratemyperformance1(excellent),2(good)or3(inneedofimprovement).□talkaboutcareersinscience□tellthestorybehindaninvention□writeanexperimentreport□thinkcriticallyaboutwhatI’vereadandheard□cultivateaspiritofinnovationI’velearnttomakeuseofthefollowingwordsandexpressions:_________________________________________________________________________________________________________________________________________________________Istillneedtoimprove:___________________________________________________________________________________________________________________________________________________Finishyourpresentation.Unit3TheWorldofScience第2课时ToreadtheinstructionsfortheexperimentTolearntoanalysethestructureofanexperimentinstructionTolearntowriteareportoftheexperimentReadtheinstructionsfortheexperimentandanswerthequestions.MagicbottleWritinganexperimentreportMaterialsAboiledeggAglassbottle(bottleneckabitsmallerthantheegg)HotwaterProcedureRemovetheshelloftheegg.2.Carefullypoursomehotwaterintothebottle.thecorrectorusualwayofdoingsth.步骤，程序3.Shakethebottlegently.4.Pouroutthehotwater.5.Quicklyputtheeggontopofthebottle.ResultsNote:Dotheexperimentundertheinstructionsofateacher.1.Whatdoyouthinktheresultsofthisexperimentwillbe?2.Whatcanyoulearnfromthisexperiment?Theeggwillsqueezeintothebottle.Theexperimentshowsustheeffectsofairpressure.Airpressureindeedexists,anditisverypowerful.CompletetheboxeswiththeinformationinActivity5.Dofurtherresearchifnecessary.Introducetheaimoftheexperiment.Thisexperimentisdesignedto_____________________________________________________________________________________________________________________Introductionshowthatairpressureindeedexistsanditisverypowerful.Describethematerialsusedintheexperimentandexplaintheprocedure.Iprepared_____________________________________todothisexperiment.Procedure:________________________________________________________________________________________________________________________________________________________________________________________Mainbodyaboiledegg,abottle,somehotwaterFirst,removetheshelloftheegg.Then,carefullypoursomehotwaterintothebottleandshakethebottlegently.Atlast,pouroutthewaterandputtheeggonthetopofthebottle.Reporttheresultsandwhatyouhavelearnt.Aftertheexperiment,Icandrawtheconclusionthat________________________________________________________________________________________.ConclusionNowwriteareportoftheexperiment.theairpressureexists,anditistheforceoftheairthatpushedtheeggintothebottle1.审题定调：实验报告属于说明文体裁，其最大特点就是知识性、严谨性和科学性。它是对客观事实的阐述，措辞应真实严谨，准确恰当。2.确定主体内容：实验报告需要客观地介绍实验的整个过程。可以按照实验目的——实验器具——实验方法——实验结果——得出结论的顺序依次进行说明。介绍实验步骤时，可适当使用表示顺序的词汇，使叙述条理、清楚。Howtowriteanexperimentreport?3.确定人称、时态：描述实验时，时态用一般现在时，人称用第三人称单数。4.核定表达：★实验目的：inordertofind...;Theaimoftheexperimentistofind...;withthepurposeofdiscovering...;doresearchon...★实验器具：beaker;Bunsenburner;crucible;glassrod(玻璃棒);ironnail;testtube;tong;balance;...★实验方法或过程：dotheexperimentasfollows;first(ly);second(ly);third(ly);finally;then;next;afterthat;twohours’later;afterseveraldays;...★实验结论：Fromthisexperimentwecanconclude...;inconclusion;drawaconclusionthat...;Wecanlearnfromtheexperiment...;Wecanfindoutthat...;Youcansee/discover...★原因和结果：Thereasonisthat...;Thisisbecause...;resultfrom/in;leadto;cause;...Theexperimentisdesignedtoprovewhetherairpressurereallyexists.Atthebeginningoftheexperiment,Ipreparedthematerials,includingaboiledegg,aglassbottlewhoseneckisabitsmallerthantheegg,andsomehotwater.Withallthethingsprepared,theexperimentbegan.First,Iremovedtheshelloftheegg.Then,Icarefullypouredsomehotwaterintothebottle,andshookthebottlegently.Afterafewminutes,Ipouredoutthehotwater.Justatthesametime,Iquicklyplacedtheeggontopofthebottle.Tomyamazement,theeggsqueezedintothebottleatonce.Aftertheexperiment,Icandrawtheconclusionthatairpressureindeedexists,anditisverypowerful.Itistheforceoftheairthatpushedtheeggintothebottle.Writea