英语八年级下冀教版Unit4Lesson25课件.ppt

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1、WelcomeToOurClass梅州市学艺中学熊思秀____TaughtbyXiongSixiuLesson25Let’sDoanExperiment!Learnthewordsandexpressionsscience科学experiment实验;试验theory理论;学说fill装满jar广口瓶;罐子upside上部;上边prove证实;证明observe观察;监视scientific科学的method方法;办法Thinkaboutit.Doyouliketodoexperiments?Whatdidy

2、ouwanttoknowbymakingtheexperiment?Whatexperimentshaveyoudone?4.Didyoufinishitsuccessfully?*WhydoesDannysaytheyshoulddothisexperimentoutside?*WhatwillBriando?*DoesDannyhavethesametheoryasBrian’s?*What’sBrian’stheory?Questions1.What’sthemeaningoftheword“theor

3、y”?2.What’sthemeaningoftheword“experiment”?3.WhatdoesBriandoabouttheexperimentatfirst?4.WhydoesDannywanttodotheexperimentoutside?5.WillBriandotheexperimentinside?WhatdoesJennysay?Listenagainandanswermorequestions1.What’sthemeaningoftheword“theory”?A“theory”

4、isanidea.2.What’sthemeaningoftheword“experiment”?An“experiment”showswhathappens.Listenagainandanswermorequestions3.WhatdoesBriandoabouttheexperimentatfirst?Hereadabouttheexperiment.Hefilledthejarwithwater,coveredthetopwithapieceofcardboard,andthenheturnedit

5、upsidedown.Listenagainandanswermorequestions4.WhydoesDannywanttodotheexperimentoutside?Dannyisnotsurewhetherthefloorwillgetwet?Listenagainandanswermorequestions5.WillBriandotheexperimentinside?Yes.Heissurethefloorwon’tgetwet.WhatdoesJennysay?Let’sdotheexper

6、imentandseewhathappens.ListenagainandanswermorequestionsListenandrepeatthetextcarefully.MainSentences1.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……2.Iturnthejarupsidedown.我把广口瓶倒置。upsidedown的意思是“向

7、下翻转过来”.Youholdthebookupsidedown.你把书拿倒了。rightsideup是“正面朝上”的意思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。3.I’msurethefloorwon’tgetwet.我确信地板不会湿。4.We’lldotheexperimentandobservedwhatwillhap

8、pen.我们将做这个实验并观察会发生什么情况。observed动词,“观察”。observesb.do/doingsth.如：Iobservedherdance.WhenIpassedbythegrass,IobservedhimWalking.Readthetexttogetherloudly.Let’sdoaninterestingexperiment.First,I____ajar_____a