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1、Unit5LookintoScienceLesson25Let'sDoanExperiment1.Doyoulikescience?2.Whatkindsofexperimentshaveyoudoneinscienceclass?3.Ifyouholdajarthatisfilledwithwaterupsidedown,whatwillhappen?upsidedownaɪaʊ倒置的，颠倒的rightsideupaɪ正面朝上upsideaɪ上边，上部scienceaɪ科学adj.scientificaɪɪɪdoan
2、experimentɪ做实验Whatcantheydo?jarɑ:广口瓶，罐子fillɪ装满Howmanystrawberries?observeɜ：观察，监视What'shedoing?ingprove证实;证明method方法;办法Listentothetapeandanswerthequestions:1.WhatwillBraindo?2.WhydoesDannysaytheyshoulddothisexperimentoutside?BrainwilldoanexperimentBecauseDannythi
3、nksthefloorwillgetwet.Ithink…:“我认为……”,其后可接that引导的宾语从句。在使用时要注意，否定主句,反问从句。getwet意为“变湿”。后接形容词作表语。pourout：“倒出,使流出,涌出”。pour…into…：“把……倒进……”。besureof：“确信；对……有把握”puton：“穿上”,为“动词+副词”构成的短语。“Itis+形容词+enoughtodosth.”“做某事是足够……的”。=too…to…=so…that…。concludefrom意为“从……推断,从……中得出
4、”。find,findout,discover,invent(1)find意为“找到,发现”,强调“找”的结果,也可指偶然发现、碰到,其后可接名词、复合结构或that从句。(2)findout指“弄清楚,查明”。着重表示通过调查、分析、思考等得出结果。(3)discover意为“发现”,指发现已存在但不为人所知的事物。(4)invent意为“发明”,指发明原来不存在的东西。(1)WheredoesDannythinktheyshoulddotheexperiment?(2)Whatkeepsthewaterinthej
5、ar?(3)IsJennysureofhertheory?Howdoyouknow?(4)WhydoesDannyputonhisraincoat?(5)WhatdoesDannyconclude?Readthelessonandanswerthequestions.Dannythinksthattheyshoulddotheexperimentoutside.Theforceoftheair./Theairpressure.Yes,sheis.SheissosureofhertheorythatBriancandot
6、heexperimentoverDanny’sheadandhewon’tgetwet.Becausehethinkshewillgetwet.Airisstrongerthanhethought.Putapieceofcardboardoverthejar.Thejarofwaterisupsidedown,butthewaterstaysinthejar.Thisisbecauseairpressurepushesthecardboardontothejar.Filltheglassjarwithwater.Tur
7、ntheglassjaroverquickly.Holdyourhandonthecardboardforafewseconds.Removeyourhandfromunderneaththejar.Whathappens?Thereismoreairoutsidethejarthaninside,sothereismoreairpressureoutsidethaninside.Readtheexperiment.Putthesentenceinthecorrectorder.251346Whathappenswhe
8、nyouuselesswater,morewater,wetcardboard,ordifferentkindsandsizesofjars?Trytodotheexperimentinthislessonyourself.1.Makealistofthematerialsandtoolsthatwewilluseintheexp
