Unit3TheworldofscienceWriting&PresentingideasLearningobjectives1.Toreadtheinstructionsfortheexperimentanddoitbyyourself,writeanexperimentreport.2.Tochooseaday-to-dayusedobjectandpredictitschangesin50years.Writinganexperimentreport1Whatdoyouthinktheresultsofthisexperimentwillbe?

2WhatcanyoulearnfromthisexperimentReadtheinstructionsfortheexperimentandanswerthequestions.5MagicbottleMaterialsAboiledeggAglassbottle(bottleneckabitsmallerthantheegg)HotwaterReadtheinstructionsfortheexperimentandanswerthequestions.5ProcedureRemovetheshelloftheegg.2.Carefullypoursomehotwaterintothebottle.thecorrectorusualwayofdoingsth.步驟，程序Readtheinstructionsfortheexperimentandanswerthequestions.53.Shakethebottlegently.4.Pouroutthehotwater.5.Quicklyputtheeggontopofthebottle.Readtheinstructionsfortheexperimentandanswerthequestions.5ResultsNote:Dotheexperimentundertheinstructionsofateacher.Readtheinstructionsfortheexperimentandanswerthequestions.5Readtheinstructionsfortheexperimentandanswerthequestions.51.Whatdoyouthinktheresultsofthisexperimentwillbe?2.Whatcanyoulearnfromthisexperiment?Theeggwillsqueezeintothebottle.Theexperimentshowsustheeffectsofairpressure.Airpressureindeedexists,anditisverypowerful.Introducetheaimoftheexperiment.Thisexperimentisdesignedto_____________________________________________________________________________________________________________________showthatairpressureindeedexistsanditisverypowerful.CompletetheboxeswiththeinformationinActivity5.Dofurtherresearchifnecessary.6CompletetheboxeswiththeinformationinActivity5.Dofurtherresearchifnecessary.6Describethematerialsusedintheexperimentandexplaintheprocedure.Iprepared_____________________________________todothisexperiment.Procedure:______________________________________________________________________________________________________________________________________________________________________________aboiledegg,abottle,somehotwaterFirst,removetheshelloftheegg.Then,carefullypoursomehotwaterintothebottleandshakethebottlegently.Atlast,pouroutthewaterandputtheeggonthetopofthebottle.CompletetheboxeswiththeinformationinActivity5.Dofurtherresearchifnecessary.6Reporttheresultsandwhatyouhavelearnt.Aftertheexperiment,Icandrawtheconclusionthat________________________________________________________________________________________.Nowwriteareportoftheexperiment.theairpressureexists,anditistheforceoftheairthatpushedtheeggintothebottle1.審題定調：

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.確定主體內容：

實驗報告需要客觀地介紹實驗的整個過程。可以按照實驗目的——實驗器具——實驗方法——實驗結果——得出結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;...★實驗結論：Fromthisexperimentwecanconclude...;inconclusion;drawaconclusionthat...;Wecanlearnfromtheexperiment...;Wecanfindoutthat...;Youcansee/discover...★原因和結果：Thereasonisthat...;Thisisbecause...;resultfrom/in;leadto;cause;...Atthebeginningoftheexperiment,Ipreparedthematerials,includingaboiledegg,aglassbottlewhoseneckisabitsmallerthantheegg,andsomehotwater.Withallthethingsprepared,theexperimentbegan.Theexperimentisdesignedtoprovewhetherairpressurereallyexists.Shareyourreportwiththeclass.7Sample

First,Iremovedtheshelloftheegg.ThenIcarefullypouredsomehotwaterintothebottle,andshookthebottlegently.Afterafewminutes,Ipouredoutthehotwater.Justatthesametime,lquicklyplacedtheeggontopofthebottle.Tomyamazement,theeggsqueezedintothebottleatonce.Aftertheexperiment,Icandrawtheconclusionthatairpressureindeedexists,anditisverypowerful.Itistheforceoftheairthatpushedtheeggintothebottle.Sample

PresentingideasWorkingroups.Lookatthepicturesanddiscusshowtheseobjectshavechangedovertheyears.1Watchthevideoandseehowthetelephonehaschangedovertheyears.ChooseoneoftheobjectsinActivity1oranobjectthatyouuseeveryday.Predicthowitwillfurtherchangeoverthenext50years.Makenotesaboutyourideas.2Presentyourideastotheclass.UsethenotesinActivity2andtheexpressionsintheboxtohelpyou.3Radioswillgraduallybewithdrawnfromourlifeoverthenext50yearsbecausetheywillbereplacedbymobilephonesorotherdevices.Cordedtelephoneswilldisappearduetothepopularityofmobilephones.Computerswillbecomesmallerandlighterandcanbeusedonthepalmofthehandbecauseofthedevelopmentoftechnology.Sample1.Aftercompletingthisunit,Icanratemyperformance1(excellent),2(good)or3(inneedofimprovement).talka