Lesson25

Let’sDoanExperiment!

1.能正確理解運用correct,method,force,besure,fill...with,cover...with,turn...upsidedown

等單詞及短語的用法。（GroupA.B.C.)2.能夠確定定語從句的先行詞和關系詞。（GroupA.B.)3.能夠邊做邊用英語描述本課的實驗。（GroupA.B）

4.學會依據實驗，辨別是非。(GroupA.B.C.)Learninggoals（學習目標）

Learnthenewwordsingroups.Thenshowyourpronunciation.(小組內互相幫助，學習新單詞，并展示合作學習成果）Listentothetapeandcirclethenewwordsinthetext.Trytounderstandthenewwordsandtext.（聽錄音，劃單詞，初步理解文章大意及新單詞的用法）過目不忘（大聲朗讀課文，組內合作，完成任務）

Group（ＡＢＣ）

1.WheredoesDannythinktheyshoulddotheexperiment?

Dannythinksthey

shoulddothe

experimentoutside.2.Howtodotheexperiment?①Fillajarwithwater.

②Coverthetopwithapieceofcardboard.

③Turnthejarupsidedown.

④Take

yourhand

off

thecardboard.

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

sth.對……有把握besureto

do

sth.一定（要做某事）besurethat+從句

確信……1.Areyousure____it?2.Besure____gettoschoolontime.3.I’msure______heisright.讀一讀議一議cover…with用…把…蓋上take…off把…從…拿開oftothat（再次大聲朗讀，組內合作，探究問題）（GroupA.B.)4.WhydoesDannyputonhisraincoat?Becausehethinkshewillgetwet.5.WhatdoesDannyconclude?Airisstrongerthanhethought.6.Whatkeepsthewaterinthejar?Theforceoftheair/theairpressure讀一讀議一議三讀課文,找出下列詞組和句子，并寫出其意思。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…裝滿把…顛倒科學的方法涌出用…把…蓋上把…從…拿開對……有把握空氣的壓力定語從句概念:定語從句：在復合句中修飾名詞或代詞的句子，叫定語從句。先行詞：被定語從句修飾的詞叫先行詞。關系詞：引導定語從句的詞叫關系詞。

(先行詞做賓語時，引導定語從句的連詞可以省略）Iwanttoknowtheboy

whois

thetallest.句子做定語修飾boy先行詞關系詞定語從句Maryisagirlwho

haslonghair.關系代詞關系副詞which,who,whom,whose,thatWhere,when,why(限定性)定語從句的結構用適當的關系詞填空：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.做一做練一練一、根據漢語完成句子（GroupA.B.C)1.我媽媽用布把桌子蓋住了Mymother_____thetable_____cloth.2.我把廣口瓶倒置。（C）Ｉ＿＿＿thejar＿＿＿＿＿＿.3.我不能肯定他什么時候來這兒。(A.B)I’m________whenhewillcomehere.4.他的書包裝滿了書。

He______hisbag_____manybooks.Hisbag_________________manybooks.turnupsidedownnotsure二、用正確的詞組完成短文。(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練一練pouroutissuregetwetcorrectconcludeforcetakesoffAreyouhappyintheclass?Exchangeyourfeelingsingroups.Pleaseuseadj.todescribeyourfeelings.(通過自己努力學到的知識快樂嗎？組內進行交流，請用形容詞描述你在這節課上的的感受)Iam/feel______________.Ithinktheexperimentis_____________.(happy/excited/successful/interesting/