冀教版初中八下Unit 4 Look into Science! Lesson 25 Let’s Do an Experiment同步课件.ppt

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1、Lesson25:LetsDoanExperimentNewwordstheoryn.理论filln.装满jarn.广口瓶upsiden.上部proven.证明observev.观察THEORYE=MC²ThinkaboutitDoyouliketodoexperiments?Whatexperimentshavedone?WhatexperimentisBraingongtodo?What’sDanny'stheoryaboutwhatwillhappen?Oneexperiment,twotheoriesB:a“theory”isanidea.Athe

2、orypredictswhatwillhappen.Anexperimentshowswhathappens.B:Didyoureadaboutthisexperiment,Danny?Ifillajarwithwater.Icoverthetopwithapieceofcardboard.Then,Iturnthejarupsidedown.J:guesswhatwillhappen!D:I’mnotsure.Ithinkthefloorwillgetwet.Maybeyoushoulddothisexperimentoutside,Brain!B:No

3、,wecandoitinside.I’msurethefloorwon’tgetwet.D:whynot?Thecardboardcan’tkeepthewaterinthejar!j:Let’sdothe；andseewhathappens.Brainhasontheory,andDannyhasanother.Wecanprovewho’sright.B:great!We’lldotheexperimentandobservewhatwillhappen.Let’sdoitIfbraindoestheexperiment,willthefloorget

4、wet?Imaginewhatwillhappen.Withapartner,makeupadialogue.Doyouliketodoexperiments?你喜欢做实验吗？experiment是一大个兼类词。n实验，试验，vi.做实验Weoftendoexperimentsinourscienceclass.我们在自然学课上经常做实验。Look!Someboysaredoinganexperimentintheroom.瞧！几个男孩儿正在房间里做实验。CanyouexperimentwiththeVCDplayer?你能试一下这台影碟机吗？Tomise

5、xperimentinguponalight.汤姆正在一个灯泡做实验。Ifillthejarwithwater.我把广口瓶里装满水。fill…with…用……把……（容器）装满意同putsth.insth.把……装到……（容器）里Jackfilledhisbackpackwithbooks.=Jackputthebooksintohisbackpack.杰克把书装进书包。Fillintheblankswiththegivenwords.用所给的单词填空。Thegirlisfilledwithjoy(fear).这个女孩内心充满了喜悦（恐惧）。Icovert

6、hetopwithapieceofcardboard.再用一张纸板盖在瓶口上。cover…with…用……把……盖上covern.封面，盖子；覆盖Davidbrokethecoverofhisbook.大卫把他的书皮撕破了。Pleasecoverthejarwithacover.请用盖子把瓶子盖上。（前为动词，后为名词）Thegroundiscoveredwithsnow.地面被冰雪覆盖了。apieceofcardboard一张纸板piece用来表示不可数名词的量，块，件，条，片等。apieceofmusic一段音乐asong一首歌apieceofnews

7、一则消息apieceofcloth一块布apieceofwood一块木头在表示事物的量时，piece可以根据实际情况用单数或复数，而名词则只能用单数。twopiecesofchalk两枝粉笔fivepiecesofpaper5张纸Pleasepassmeapieceofpaper.请递给我一张纸。Tomwashungry,heatetwomorepiecesofbread.sure确定，确信，务必。下面总结一下其具体用法。1)（美语）用于口语交际，当然，理应如此。--Areyougoingto?你去吗？--Sure!当然去！--Canyouhelpme?你

8、能帮我一下吗？--Sure!当然可以！2)besureofsth.