九年级Lesson26Keep-the-candle-burning讲解学习.ppt

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1、WelcometoourclassDoyoulikedoingscienceexperiments？Why?Haveyoudoneascienceexperiment?Theyaredoingexperiments。acandleacandleholderabigglassjarashallowdishalightermatchessomewater()Putthecandleholderonthedish.()Examinethewaterinthejar.()Fillthedishhalffullwithwater.()Lett

2、hecandleburnfortwoorthreeminutes.()Putthecandleinthecandleholder.()Lightthecandle.()Carefullyputthejaroverthecandleuntilthetopofthejarrestsonthedish.Listencarefullyandputthesentencesinthecorrectorder.2735146burningmatchlighterLetuntilAsusesuseduponefifthismadeupofrises

3、WatchSayandFillFirst,_____thecandle____thecandleholder.Second,_____thecandleholder____thedish.Third,_____thedish__________water.Fourth,______thecandle.Fifth,______thecandle______fortwoorthreeminutes.HowdowedotheexperimentputputoninfillhalffullwithlightletburnImagineand

4、predictIfIputthejaroverthecandleuntilthetopofthejarrestsonthedish,whatwillhappen?I’mnotsure…I’msure…will+v…Ithink…Maybe…Whatobservationcanyoumake?Thecandlestopsburning.Thewaterrisesup.Do,ObserveandanswerSixth,carefullyputthejaroverthecandleuntilthetopofthejarrestsonthe

5、dish.Finally,examinethewaterinthejar.Whatcanyousee?DiscussingWhydidthecandlestopburning?Whydidthewaterrise?Howfardidthewaterrise?Why?Whatdoesthisexperimentshowaboutair?Becauseithas_________theoxygenintheairandthereis____oxygeninthejar.Becausetheforceoutsidethejaris____

6、_____thantheforceinsidethejar.Becausethereisabout________oxygenintheair,sothewaterrisesandfillsabout_______ofthejar.Itprovedthatthereis_________oxygenintheair.usedupnostrongerone-fifthone-fifthone-fifthGroupWorkTask1:DoandspeakEnglishWorkingroups,oneistodotheexperiment

7、byhimself.othersdescribethestepsandtheconclusionoftheexperimentinEnglish（以小组形式做实验，并用英语叙述实验步骤和结论。）Task2：Finishtheexperimentreport!Whiledoingtheexperiment,oneistowritetheexperimentreport!Choseonestudenttocheckanothergroup.（再选一名学生写实验报告单，一名学生做监督员。如果说汉语为失败。）Name:WhichGroup:

8、Date:ExperimentName:ExperimentMaterials:ExperimentSteps:Observation:Conclusion:Howmuchoxygenisthereintheair?acandle，a