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

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_____thejar_____________and_____hishand_____thecardboardslowly.Dannythinksthewaterwill________.ButJenny________thatthewaterwillstayinthejarandDannywillnot__________.Whosetheoryis________?Aftertheexperiment,They_________thatthe________oftheairhelpsthecardboardholdthewaterinthejar.Itisstrongenoughtoholdthewater.Theairisstrongerthanwethought.fillswithcoverswithturnsdownupside练一练pouroutissuregetwetcorrectconcludeforcetakesoffAreyouhappyintheclass?Exchangeyourfeelingsingroups.Pleaseuseadj.todescribeyourfeelings.(通过自己努力学到的知识快乐吗？组内进行交流，请用形容词描述你在这节课上的的感受)Iam/feel______________.Ithinktheexperimentis_____________.(happy/excited/successful/interesting/