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

unit5lookintoscience lesson25let sdoanexperiment 1 doyoulikescience 2 whatkindsofexperimentshaveyoudoneinscienceclass 3 ifyouholdajarthatisfilledwithwaterupsidedown whatwillhappen upsidedown a a 倒置的 颠倒的 rightsideup a 正面朝上 upside a 上边 上部 science a 科学 adj scientific a doanexperiment 做实验 whatcantheydo jar 广口瓶 罐子 fill 装满 howmanystrawberries observe 观察 监视 what shedoing ing prove证实 证明method方法 办法 listentothetapeandanswerthequestions 1 whatwillbraindo 2 whydoesdannysaytheyshoulddothisexperimentoutside brainwilldoanexperiment becausedannythinksthefloorwillgetwet 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 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 whatkeepsthewaterinthejar 3 isjennysureofhertheory howdoyouknow 4 whydoesdannyputonhisraincoat 5 whatdoesdannyconclude readthelessonandanswerthequestions dannythinksthattheyshoulddotheexperimentoutside theforceoftheair theairpressure yes sheis sheissosureofhertheorythatbriancandotheexperimentoverdanny sheadandhewon tgetwet becausehethinkshewillgetwet airisstrongerthanhethought putapieceofcardboardoverthejar thejarofwaterisupsidedown butthewaterstaysinthejar thisisbecauseairpressurepushesthecardboardontothejar filltheglassjarwithwater turntheglassjaroverquickly holdyourhandonthecardboardforafewseconds removeyourhandfromunderneaththejar whathappens thereismoreairoutsidethejarthaninside sothereismoreairpressureoutsidethaninside readtheexperiment putthesentenceinthecorrectorder 2 5 1 3 4 6 whathappenswhenyouuselesswater morewater wetcardboard ordifferentkindsandsizesofjars trytodotheexperimentinthislessonyourself 1 makealistofthematerialsandtoolsthatwewilluseintheexperiment 2 writedowntwodifferenttheories retelltheprocessoftheexperiment 3 writedownthestepsofdoingtheexperiment 4 writedowntheresultoftheexperiment summarytheexperiment howdowedotheexperiment let sdoaninterestingexperiment first i ajar adesk it water then thetop apieceofcardboard wheni thejar canyouguesswhatwillhappen down put on fill with cover with turn upside whatisscience whatisscience canyouexplain pleasemakeiteasyformybrain it saboutmakingobservations whydoonionsmakemecry whydocloudsgoby whatkeepsthebirdsinthesky that sjustscience it saboutmatter theuniverse whydoesacarstay