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ID:40265960
大小:3.97 MB
页数:15页
时间:2019-07-29
《九年级Lesson26Keep the candle burning》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、WelcometoourclassDoyoulikedoingscienceexperiments?Why?Haveyoudoneascienceexperiment?Theyaredoingexperiments。Lesson26KeeptheCandleBurningBurningneeds_______.Experimentname:Howmuchoxygenisthereintheair?oxygenacandleacandleholderabigglassjarashallowdishalightermatchessomewater()Putthecandl
2、eholderonthedish.()Examinethewaterinthejar.()Fillthedishhalffullwithwater.()Letthecandleburnfortwoorthreeminutes.()Putthecandleinthecandleholder.()Lightthecandle.()Carefullyputthejaroverthecandleuntilthetopofthejarrestsonthedish.Listencarefullyandputthesentencesinthecorrectorder.2735146
3、burningmatchlighterLetuntilAsusesuseduponefifthismadeupofrisesWatchSayandFillFirst,_____thecandle____thecandleholder.Second,_____thecandleholder____thedish.Third,_____thedish__________water.Fourth,______thecandle.Fifth,______thecandle______fortwoorthreeminutes.Howdowedotheexperimentputp
4、utoninfillhalffullwithlightletburnImagineandpredictIfIputthejaroverthecandleuntilthetopofthejarrestsonthedish,whatwillhappen?I’mnotsure…I’msure…will+v…Ithink…Maybe…Whatobservationcanyoumake?Thecandlestopsburning.Thewaterrisesup.Do,ObserveandanswerSixth,carefullyputthejaroverthecandleunt
5、ilthetopofthejarrestsonthedish.Finally,examinethewaterinthejar.Whatcanyousee?DiscussingWhydidthecandlestopburning?Whydidthewaterrise?Howfardidthewaterrise?Why?Whatdoesthisexperimentshowaboutair?Becauseithas_________theoxygenintheairandthereis____oxygeninthejar.Becausetheforceoutsidethej
6、aris_________thantheforceinsidethejar.Becausethereisabout________oxygenintheair,sothewaterrisesandfillsabout_______ofthejar.Itprovedthatthereis_________oxygenintheair.usedupnostrongerone-fifthone-fifthone-fifthGroupWorkTask1:DoandspeakEnglishWorkingroups,oneistodotheexperimentbyhimself.
7、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:Date:ExperimentName
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