+Lesson+25+Let's+do+an+experiment-冀教版九年级英语全册

Lesson25Let′sDoanExperiment!Learningaims学习目标experiment/ɪk'sperɪmənt/

n.实验；试验jar/dʒɑ:/

n.广口瓶；罐子upside/'ʌpsaɪd/

n.上部；上边pour/pɔ:/

v.倒出；倾倒correct/kə'rekt/

adj.正确的；恰当的scientific/ˌsaɪən'tɪfɪk/

adj.科学的method/'meθəd/

n.方法；办法raincoat/reɪnkəut/

n.雨衣force/fɔ:s/

n.力量v.迫使；强迫pressure/'preʃə/

n.压力，压强；挤压conclude/kən'klu:d/

v.得出结论；断定NewwordsNewPhraseturn...upsidedown

把......翻转:倒过来pourout

涌出scientificmethod

科学方法take...off

把......拿开Thinkaboutit1.Whatkindsofexperimentshaveyoudoneinscienceclass?2.Ifyouholdajarthatisfilledwithwaterupsidedown，whatwillhappen?Brian：Let′sdoanexperiment.Ifillajarwithwater.Icoverthetopwithapieceofcardboardandholditthere.ThenIturnthejarupsidedownandtakemyhandoffthecardboard.Canyouguesswhatwillhappen?Danny：Ithinkthefloorwillgetwet.Weshoulddothisexperimentoutside，Brian.Jenny：Ithinkthecardboardwillholdthewater.Danny：Idon′tthinkso.Jenny：Youthinkthewaterwillpourout，Danny.Ithinkthewaterwillstayinthejar.Let′stestwhichtheoryiscorrect.Brian：Goodidea，Jenny.That′scalledthescientificmethod.

Jenny：IamsosureofmytheorythatBriancandotheexperimentoveryourheadandIknowyouwon′tgetwet.Danny：Well，let′stryit!Brian：Areyouready，Danny?Danny：No!Wait!(Heputsonaraincoatandsitsdown.)NowIthinkI′mready.Jenny：Brian，takeyourhandoffthecardboard.Danny，JennyandBrianareinthelab.Danny：No!(Dannycloseshiseyestightly，andBriantakeshishandoffthecardboard.Thewaterstaysinthejar.)Jenny：See，Danny!Danny：Howisthatpossible?Brian：Theforceoftheairkeepsthewaterinthejar.Itisstrongenoughtoholdthewater.Danny：Wow!Brian：Sowhathavewediscovered？Jenny：Wehavediscoveredthattheairpressurehelpsthecardboardholdthewaterinthejar.Brian：Right.Whatdoyouconclude，Danny?Danny：IconcludethatairisstrongerthanIthought.LanguagePoints1.Let′sdoanexperiment!experiment/ɪk'sperɪmənt/n.实验；试验“做实验”可用do/make/carryoutanexperiment表达。eg:Dannyisdoing/making/carryingoutanexperimentinphysics.丹尼正在做一个物理实验。2.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……3.ThenIturnthejarupsidedownandtakemyhandoffthecardboard.

turn...upsidedown“把......翻转过来”.upsidedown“正面朝下”rightsideup“正面朝上4.Youthinkthewaterwillpourout,Danny.pour是及物动词，意为“倾倒；倒出；浇”，其后可以接名词/代词做宾语。pourout表示“涌出；倾倒出”。eg.Thepeoplepouredoutofthebuildingwhentheyheardthefirealarm.当听到火警时，人们从大楼里蜂拥而出。拓展pour可以接双宾语或介词短语，即pour

sb.sth.=poursth.forsb.为某人倒某物。ShallIpouryouacupoftea?=ShallIpouracupofteaforyou?我给你倒杯茶好吗？pour...in/into…把……倒入/灌入……里；pour…out把……倒出。5.That′scalledthescientificmethod.That′scalled…那被叫做……此句是一般现在时的被动语态，That在这句话中充当主语，iscalled构成被动语态结构。一般现在时的被动语态的构成为：be动词(am/is/are)＋动词的过去分词。eg：Moremoneyissavedbyusingbothsidesofpaper.通过使用纸的两面，更多的钱被节省下来了。6.I’msosureof...won’t

getwet.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。Trytodotheexperimentinthislessonyourself.Tasktips：Whathappenswhenyouuselesswater，morewater，wetcardboard，ordifferentkindsandsizesofjars?Let'sDoIt!Whatisscience?Canyouexplain?Pleasemakeiteasyformybrain.It′saboutmakingobservations.Whydoonionsmakemecry?Whydocloudsgoby?Whatkeepsthebirdsinthesky?That′sjustscience.Let'sDoIt!Listenandsingalong.It′saboutmatter—theuniverse.Whydoesacarstayontheroad?Whyistheregreenalloveratoad?Whycan′tIcarryaheavyload?That′sjustscience.WhatIsScience?1.Thedininghallis_______tohold300people.A.enoughbigB.enoughsmallC.smallenoughD.bigcnough2.-Youaresosad.Whathashappencd_______you?-Ifailedthemathstest.A.ofB.withC.atD.to3.-Whatmadeyou_______?-ThenovelwrittenbyLaoShe.A.cryB.tocryC.cryingD.cried4.Idon'tthinkyoucananswerthisqucstion,_______?A.doIB.don'tIC.doyouD.canyou5.Let's_______apartytonight!A.hasB.haveC.havingD.hadDDDAB1.Welearnedsomenewwordsandphrases.experiment,jar,upside,pour,correct,scientific,met