九年级英语上册 Unit 5 Look into Science Lesson 25 Lets Do an Experiment课件 （新版）冀教版.ppt

lesson25 unit5lookintoscience 5 unit lesson25let sdoanexperiment 学习目标 objectives thenewwords experiment jar upside pour correct scientific method raincoat force pressure concludetounderstandthetheoryoftheexperiment tolearnactively words experimentjarupsidepourcorrectscientific n 实验 试验n 广口瓶 罐子n 上部 上边v 倒出 倾倒adj 正确的 恰当的adj 科学的 words methodraincoatforcepressureconclude n 方法 办法n 雨衣n 力量v 迫使 强迫n 压力 压强 挤压v 得出结论 推断出 leadin discuss doyouliketodoexperiments whatexperimentshaveyoudone listentothetapeandanswerthefollowingquestions 1 what sdanny stheory 2 what sjenny stheory dannythinksthefloorwillgetwet jennythinksthewaterwillstayinthejar pre reading while reading readthelessonandanswerthequestions 1 wheredoesdannythinktheyshoulddotheexperiment 2 whatkeepsthewaterinthejar 3 isjennysureofhertheory howdoyouknow hethinkstheyshoulddoitoutside theforceoftheair yes sheis shethinksthatbriancandotheexperimentoverdanny shead 4 whydoesdannyputonhisraincoat 5 whatdoesdannyconclude hethinksthewaterwillpourout theairisstrongerthanhethought ifillajarwithwater 我用水把瓶子装满 fill with 用 装满 hehasfilledhiscasewithmanybooks 他已经把书装满了箱子 cover with 用 盖住 languagepoints 2 iturnthejarupsidedown 我把广口瓶倒置 upsidedown 向下翻转过来 youholdthebookupsidedown 你把书拿倒了 rightsideup 正面朝上 besure that从句表示 认为 一定 而benotsure表示不确定 e g i msureshewillcomehere 我确信她会来 i mnotsurewhenhe llcomehere 我不能肯定什么时候来这儿 i msurethefloorwon tgetwet 我确信地板不会湿 4 we lldotheexperimentandobservedwhatwillhappen 我们将做这个实验并观察会发生什么情况 observed动词 观察 observesb do doingsth e g iobservedherdance whenipassedbythegrass iobservedhimwalking 1 let sdotheeandseewhathappens 2 a t isanideaandpredictswhatwillhappen 3 wecanpwho sright 4 turnthejarudownandwecanseewhatwillhappen 5 o isanotherwayofsaying watchcarefully xperiment heory rove pside bserve let sdoaninterestingexperiment first i ajar adesk it water then thetop apieceofcardboard wheni thejar canyouguesswhatwillhappen put on fill with cover with turn upside down howdowedotheexperiment post reading let sdoit inasmallgroup trytheexperimentabove tryitwiththejarfull tryitagainwiththejarnearlyempty writedownyourobservations didtheexperimentwork didanyonegetwet aballoonisfullofair ifwepierce 刺破 itwithaneedle itwillbreakwithaloudbang butifweputapieceofglueontheballoonanddothesameexperiment whatwillhappen surprisingly wewon thearthesamesound theballoonwillbecomesmallerandsmaller wewillfeelthattheairisrunningoutslowlythroughthepinhole 针孔 weknowtheballoonismadeof anexperimentaboutaballoon rubber 橡胶 whentheballoonispierced theairleavingtheballoonformsakindofforce rubberissothinthatitcan tsupport 支撑 suchforce sotheballoonbreaksquicklywithaloudbang buttheglueisdifferent it sstrongenoughtosupporttheforceoftheair peoplehavelearnedsomethingfromthisexperiment theyhaveusedthismethodtomaketires 轮胎 anexperimentaboutaballoon i 根据汉语或首字母提示 完成下列句子 1 itisthebest 方法 ofworkingoutthemathproblem 2 haveyouheardofthe 理论 before 3 mydaughterlikes 科学 morethanenglish 4 youransweriswrong andwecandoanexperimenttop it 5 don tturnthebottleu down it stoodangerous pside method theory science rove practice 1 helockedthedoor careful beforeheleft 2 let s finish theworktogethernow 3 canyouguesswhat happen in100years 4 what sanotherwayof say autumn saying ii 用所给单词的适当形式填空 carefully finish willhappen 1 我确信你是一个诚实的人 i thatyouareanhonestman 2 请用一块玻璃盖上那个杯子 please thecup apieceofglass 3 小心 否则你会弄湿的 becareful oryou ll 4