冀教版九年级英语上册 （Let's Do an Experiment）Look into Science!课件教学

Let'sDoanExperiment!Unit5LookintoScience

Whatkindsofexperimentshaveyoudoneinscienceclass?WarmingupIfyouholdajarthatisfilledwithwaterupsidedown,whatwillhappen?2.Whatkeepsthewaterinthejar?Theforceoftheair./Theairpressure.n.广口瓶；罐子3.IsJennysureofhertheory?Howdoyouknow?Yes,sheis.SheissosureofhertheorythatBriancandotheexperimentoverDanny’sheadandhewon’tgetwet.4.WhydoesDannyputonhisraincoat?Becausehethinkshewillgetwet.5.WhatdoesDannyconclude?Airisstrongerthanhethought.n.

雨衣v.得出结论；断定；推断出□Putapieceofcardboardoverthejar.□Thejarofwaterisupsidedown,butthewaterstaysinthejar.Thisisbecauseairpressurepushesthecardboardontothejar.□Filltheglassjarwithwater.n.

压力，压强；挤压Readtheexperiment.Putthesentencesinthecorrectorder.251□Turntheglassjaroverquickly.Holdyourhandonthecardboardforafewseconds.□Removeyourhandfromunderneaththejar.Whathappens?□Thereismoreairoutsidethejarthaninside,sothereismoreairpressureoutsidethaninside.3461.ThenIturnthejarupsidedownand

takemyhandoffthecardboard.

然后，我把瓶子倒置，手离开纸片。

upsidedown意思是“颠倒着，倒转着；乱七八糟”。

Languagepointse.g.Thecanoefloatedupsidedownonthelake.独木舟底朝天漂浮在湖面上。Thechildrenturnedthehouse

upsidedown.

孩子们把屋里弄得乱七八糟。

turn…upsidedown把……翻转；倒过来e.g.Ifyouturntheenvelopeupsidedown,thekeywillfallout.你如果把信封倒过来，钥匙就会掉出去。take…off把……拿开e.g.Willyoutakeyourbooksoffthetable?把你的书从桌子上拿走好吗？【拓展】takeaway&takeoff在takeaway与takeoff这两个短语中，take都是“拿、带”的意思，away和off是副词，都可以表示“离开、离去”的意思。从字面意思及结构看，这两个短语很容易被混淆。其实，这两个短语的意思和用法相差很远。★takeaway可表示“拿走”、“使离开”、“减去”等意思。如：Hissisterwantstotakeawaythisbook.他的姐姐想拿走这本书。Thegirlwastakenawayfromschool.女孩被带离学校。Takeaway3from6andyouget3.6减3等于3。★takeoff可表示“脱下”、“起飞”、“使拿开”等意思。如：Itiswarmintheroom.Pleasetakeoffyourcoat.房间很暖和，请脱下你的上衣。Whentheplanetookoff,theboywaswatchingTV.飞机起飞时，这个男孩正在看电视。Pleasetakeyourhandoffyourhead.请把你的手从头上拿下来。【运用】根据句意，用takeaway或takeoff填空。(1)Myteacher_______________mymobilephoneinclassyesterday.(2)__________thenumberfromthat,andtellmehowmuchyouhaveleft.(3)Peterwasunhappyattheschool,sohisfather_______him_______.(4)Theplanewill__________inanhour.(5)Wouldyouplease_____yourfoot_____thedesk?tookawayTakeawaytookawaytakeofftakeoff2.Youthinkthewaterwillpourout,Danny.

丹尼，你认为水会撒出来。

pour在本句中的意思是“涌流”。它还有“倒；下倾盆大雨；倾诉”的意思。e.g.Shepouredthericecarefullyintothepot.

她小心翼翼地把大米倒入罐子里。

Therainhasbeenpouringallday.

倾盆大雨下了一整天了。

Youcanpouryourtroublestoaclosefriend.

你可以向亲密朋友倾诉烦心事。pourout涌出e.g.Afterthemeetingthepeoplepouredoutincrowds.散会后,人们成群地涌出来。3.Let’stestwhichtheoryiscorrect.

咱们测试的这个理论是正确的。

correctadj.正确的；恰当的

e.g.Pleasechoosethecorrectanswers.

请选择正确的答案。4.That’scalledthescientificmethod.这就是所谓的科学方法。

methodn.方法；办法

e.g.Wehaveseveralmethodsofdealingwiththeproblem.

我们有几种处理这个问题的方法。4.IamsosureofmytheorythatBriancandotheexperimentoveryourheadandIknowyouwon’tgetwet.我对布莱恩在你头上做实验的理论很有把握，并且你不会湿的。

besureof/about表示“对……有把握”的意思。但besureof后面可以接名词、代词和v.-ing形式，而besureabout后面只能接名词或代词。如：Iwasn’tsureof/abouttheway,soIaskedsomeone.我对这个方法没有把握，所以我得问问别人。Heissureofwinningthegame.我有把握能赢得比赛。besure后面还可以接从句，意为“确信……、对……有把握”。如：I’msure(that)he’llcome.我确信他会来。I’m

notsurewhereshelives.我不确定她住哪儿。【运用】根据汉语意思将下面句子翻译成英语。我确信她这次将通过考试。___________________________________I’msureshe’llpasstheexamthistime.6.Theforceoftheairkeepsthewaterinthejar.空气的力量使水进入罐子。

force既可以作动词，也可以作名词。

★force用作动词时是及物动词，意为“强

迫、促使”。

“强迫某人做某事”可用forcesb.todosth.

表示，如：

Youshouldn’tforceotherstodobad

things.你不应该强迫别人做坏事。★force用作名词时，意为“力量、势力、威力”，可用作可数名词，也可用作不可数名词，如：Theyhavecometoknowtheforcesofnature.他们来了解自然的力量。Hedidn’tusemuchforce.他没怎么用力。【运用】根据所给汉语意思，完成下列英语句子，每空一词。(1)洪水的力量可以把房屋和大树冲走。_______________thefloodcantakehousesandtreesaway.(2)这个老板经常强迫他的工人工作很长时间。Thebossoftenforceshisworkers_______foralongtime.Theforceoftowork7.Sowhathavewediscovered?

那么，我们发现了什么？

so在本句中用作副词，表示惊讶的语气。e.g.Soyoudon’tlikeit.

这么说，你不喜欢它。

Soyouhavedifficultyinlearningmath.

看来你学数学有困难。Trytodotheexperimentinthislessonyourself.Tasktips:Whathappenswhenyouuselesswater,morewater,wetcardboard,ordifferentkindsandsizesofjars?Listenandsingalong.Whatisscience?Whatisscience?Canyouexplain?Pleasemakeiteasyformybrain.It’saboutmakingobservations.Whydoonionsmakemecry?Whydocloudsgoby?Whatkeepsthebirdsinthesky?That’sjustscience.It’saboutmatter—theuniverse.Whydoesacarstayontheroad?Whyistheregreenalloveratoad?Whycan’tIcarryaheavyload?That’sjustscience.Trythisexperimentathomeandusethescientificmethodtorecordtheprocessandreporttheresults.Youmayalsochoosetotakephotosordrawpicturesoftheexperiment.Homework

Lesson25

Let’sDoanExperiment!

1.能正确理解运用correct,method,force,besure,fill...with,cover...with,turn...upsidedown

等单词及短语的用法。（GroupA.B.C.)2.能够确定定语从句的先行词和关系词。（GroupA.B.)3.能够边做边用英语描述本课的实验。（GroupA.B）

4.学会依据实验，辨别是非。(GroupA.B.C.)Learninggoals（学习目标）

Learnthenewwordsingroups.Thenshowyourpronunciation.(小组内互相帮助，学习新单词，并展示合作学习成果）Listentothetapeandcirclethenewwordsinthetext.Trytounderstandthenewwordsandtext.（听录音，划单词，初步理解文章大意及新单词的用法）过目不忘（大声朗读课文，组内合作，完成任务）

Group（ＡＢＣ）

1.WheredoesDannythinktheyshoulddotheexperiment?

Dannythinksthey

shoulddothe

experimentoutside.2.Howtodotheexperiment?①Fillajarwithwater.

②Coverthetopwithapieceofcardboard.

③Turnthejarupsidedown.

④Take

yourhand

off

thecardboard.

3.WhatisJenny’sidea?Isshesureofhertheory?Jennythinksthewaterwillstayinthejar.Sheissosureofhertheory.besureof

sth.对……有把握besureto

do

sth.一定（要做某事）besurethat+从句

确信……1.Areyousure____it?2.Besure____gettoschoolontime.3.I’msure______heisright.读一读议一议cover…with用…把…盖上take…off把…从…拿开oftothat（再次大声朗读，组内合作，探究问题）（GroupA.B.)4.WhydoesDannyputonhisraincoat?Becausehethinkshewillgetwet.5.WhatdoesDannyconclude?Airisstrongerthanhethought.6.Whatkeepsthewaterinthejar?Theforceoftheair/theairpressure读一读议一议三读课文,找出下列词组和句子，并写出其意思。fill…with2.turn…upsidedown3.pourout4.scientificmethod5.cover…with6.besureofsth7.take…off8.theforceoftheair1.Icoverthetopwithapieceofcardboardandholditthere.2.Theforceoftheairkeepthewaterinthejar.3.Itissostrongenoughtoholdthewater.4.IamsosureofmytheorythatBriancandotheexperimentandIknowyouwon’tgetwet.

找一找用…把…装满把…颠倒科学的方法涌出用…把…盖上把…从…拿开对……有把握空气的压力定语从句概念:定语从句：在复合句中修饰名词或代词的句子，叫定语从句。先行词：被定语从句修饰的词叫先行词。关系词：引导定语从句的词叫关系词。

(先行词做宾语时，引导定语从句的连词可以省略）Iwanttoknowtheboy

whois

thetallest.句子做定语修饰boy先行词关系词定语从句Maryisagirlwho

haslonghair.关系代词关系副词which,who,whom,whose,thatWhere,when,why(限定性)定语从句的结构用适当的关系词填空：Theboy_______wesawyesterdayisTomTheplace________theyvisitedisveryfamous.Thenurse_______istakingtheoldman’stemperatureismyaunt.HowcanIgettothebookshop_______hasalotofhistorybooks?who/whom/that/不填which/that/不填who/thatwhich/that

Let’sdotheexperimentingroups.One(B)givesinstructionsinEnglish.Anotherone(C)followstheinstructions.Theothers(A)observewhatwillhappen.Thentalkaboutyourobservationsingroups.Andwritedowntheresultoftheexperiment.

Thecardboardwillkeepthewaterinthejar.做一做练一练一、根据汉语完成句子（GroupA.B.C)1.我妈妈用布把桌子盖住了Mymother_____thetable_____cloth.2.我把广口瓶倒置。（C）Ｉ＿＿＿thejar＿＿＿＿＿＿.3.我不能肯定他什么时候来这儿。(A.B)I’m________whenhewillcomehere.4.他的书包装满了书。

He______hisbag_____manybooks.Hisbag_________________manybooks.turnupsidedownnotsure二、用正确的词组完成短文。(GroupA.B.)

Danny，JennyandBriandoaninterestingexperiment.First,Brian____thejar_____water,then______thetop_____apieceofcardboard.Whenhe_