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ID:57450796
大小:3.83 MB
页数:15页
时间:2020-08-21
《九年级Lesson26Keep-the-candle-burning讲解学习.ppt》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
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
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