Unit+3+The+world+of+Science+Presenting+ideas+課件【知識精講精研】高中英語外研版（2019）必修第三冊

Unit3TheWorldofScience第1課時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課時ToreadtheinstructionsfortheexperimentTolearntoanalysethestructureofanexperimentinstructionTolearntowriteareportoftheexperimentReadtheinstructionsfortheexperimentandanswerthequestions.MagicbottleWritinganexperimentreportMaterialsAboiledeggAglassbottle(bottleneckabitsmallerthantheegg)HotwaterProcedureRemovetheshelloftheegg.2.Carefullypoursomehotwaterintothebottle.thecorrectorusualwayofdoingsth.步驟，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.審題定調(diào)：實驗報告屬于說明文體裁，其最大特點就是知識性、嚴謹性和科學性。它是對客觀事實的闡述，措辭應真實嚴謹，準確恰當。2.確定主體內(nèi)容：實驗報告需要客觀地介紹實驗的整個過程?？梢园凑諏嶒災康摹獙嶒炂骶摺獙嶒灧椒ā獙嶒灲Y(jié)果——得出結(jié)論的順序依次進行說明。介紹實驗步驟時，可適當使用表示順序的詞匯，使敘述條理、清楚。Howtowriteanexperimentreport?3.確定人稱、時態(tài)：描述實驗時，時態(tài)用一般現(xiàn)在時，人稱用第三人稱單數(shù)。4.核定表達：★實驗目的：inordertofind...;Theaimoftheexperimentistofind...;withthepurposeofdiscovering...;doresearchon...★實驗器具：beaker;Bunsenburner;crucible;glassrod(玻璃棒);ironnail;testtube;tong;balance;...★實驗方法或過程：dotheexperimentasfollows;first(ly);second(ly);third(ly);finally;then;next;afterthat;twohours’later;afterseveraldays;...★實驗結(jié)論：Fromthisexperimentwecanconclude...;inconclusion;drawaconclusionthat...;Wecanlearnfromtheexperiment...;Wecanfindoutthat...;Youcansee/discover...★原因和結(jié)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