Unit 3 The world of Science Writing -高中英語外研版（2019）必修第三冊(cè)

Unit3Unit3TheworldofscienceToreadtheinstructionsfortheexperimentTolearntoanalysethestructureofanexperimentinstructionTolearntowriteareportoftheexperimentReadtheinstructionsfortheexperimentandanswerthequestions.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(shí)驗(yàn)報(bào)告屬于說明文體裁，其最大特點(diǎn)就是知識(shí)性、嚴(yán)謹(jǐn)性和科學(xué)性。它是對(duì)客觀事實(shí)的闡述，措辭應(yīng)真實(shí)嚴(yán)謹(jǐn)，準(zhǔn)確恰當(dāng)。2.確定主體內(nèi)容：實(shí)驗(yàn)報(bào)告需要客觀地介紹實(shí)驗(yàn)的整個(gè)過程?？梢园凑諏?shí)驗(yàn)?zāi)康摹獙?shí)驗(yàn)器具——實(shí)驗(yàn)方法——實(shí)驗(yàn)結(jié)果——得出結(jié)論的順序依次進(jìn)行說明。介紹實(shí)驗(yàn)步驟時(shí)，可適當(dāng)使用表示順序的詞匯，使敘述條理、清楚。Howtowriteanexperimentreport?3.確定人稱、時(shí)態(tài)：描述實(shí)驗(yàn)時(shí)，時(shí)態(tài)用一般現(xiàn)在時(shí)，人稱用第三人稱單數(shù)。4.核定表達(dá)：★實(shí)驗(yàn)?zāi)康模篿nordertofind...;Theaimoftheexperimentistofind...;withthepurposeofdiscovering...;doresearchon...★實(shí)驗(yàn)器具：beaker;Bunsenburner;crucible;glassrod(玻璃棒);ironnail;testtube;tong;balance;...★實(shí)驗(yàn)方法或過程：dotheexperimentasfollows;first(ly);second(ly);third(ly);finally;then;next;afterthat;twohours’later;afterseveraldays;...★實(shí)驗(yàn)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.Writeareportofanexperimentthatyou’velearnedinyourchemistryorphysicscla