九年级英语上册Unit5LookintoScienceLesson26KeeptheCandleBurning冀教版.ppt

Lesson26,Unit5LookintoScience,5,Unit,Lesson26KeeptheCandleBurning,学习目标,objectives,Masterthenewwordsandphrases:holder,shallow,lighter,match,examine,oxygen；useupLearntodotheexperimentwithcandle.Knowmoreaboutscience.,holdern.支托物candleholdern.蜡烛座shallowadj.浅的lightv.点燃lightern.打火机；点火器matchn.火柴burnv.燃烧examinev.检查oxygenn.氧气useup用完,Words,Leadin,match,burn,candleholdern.,Thinkaboutit,Doyouthinkscienceisinteresting?Whyorwhynot?NameoneortwofamousChinesescientist.Whatdoyouknowaboutthem?,Scienceissointeresting!Imsureyoulllikethisexperiment!,Whatdoyouneed?,AcandleAcandleholderAbigglassjarAshallowdishwithwatermatches,While-reading,Whatdoyoudo?,1.Putthecandleinthecandleholder.2.Putthecandleholderinhedish.3.Fillthedishhalffullofwater.4.Lightthecandle.5.Letthecandleburnfortwoorthreeminutes.6.Carefullyputthejaroverthecandleuntilthetopofthejarrestsonthedish.7.Lookatthewaterinthejar.Whatobservationcanyoumake?,Whatishappening?,Asthecandleburns,itusesupoxygenintheair.Whenthecandlestopsburning,ithasusedupalltheoxygeninthejar.Thewaterinsidethejarthenrises.Howfardidthewaterrise?Thereisaboutone-fifthoxygenintheair,sothewaterrisesandfillsaboutone-fifthofthejar.,Languagepoints,Keepthecandleburning!让蜡烛燃烧！keepsth.(sb.)doing,使某物（某人）保持做某一动作。e.g.Dontkeepthewaterfalling.不要再让水继续流了。Shekeptmeholdingthefarwithmyhand.她让我一直用手握住瓶子。,1.Doyouthinkscienceisinteresting?你认为自然有趣吗？science科学；scientist自然科学，科学家e.g.WangPenglovesscienceverymuch.Hewantstobeascientist.王鹏非常喜欢科学。他想成为一名科学家。,2.ashallowdishwithwater一个装水的浅盘shallowadj.浅的反义词：deep深的e.g.Pleasepassmeashallowdish(plate).请递给我一个浅盘子。Theideaofthepassageisveryshallow.Icanunderstandit.这篇短文的意思很浅显，我能读懂它。,lightv.点燃，照亮Itstimetolightup.该点灯了。Itscoldintheroom.Letslightafire.房间里太冷了。咱们把火生起来吧。,3.lightthecandle点亮蜡烛=makethecandleburn使蜡烛燃烧,lightn.光，光线（不可数）；电灯（可数）Themoonlightcomesintotheroomthroughthewindow.月光透过窗子照进了房间。Dontforgettoturnoffthelightswhenyouleave.当你离开的时候不要忘了关灯。,lightadj.颜色浅的（反义词dark）；（分量）轻的（反义词heavy）Roselikesthelightgreenskirt.罗斯喜欢那件淡绿色的裙子。Thebagisverylight.Marycancarryiteasily.那个包很轻。玛丽能轻易地把它搬起来。,4.Carefullyputthejaroverthecandle.小心地把瓶子倒扣在蜡烛上。carefullyadv.仔细地，小心地carefuladj.细心的，认真的carev.关心；在意care(v.)+ful=careful(adj.)careful(adj.)+ly=carefully(adv.)Jennyisacarefulgirl.Shedoeseverythingcarefully.Sheoftencaresforothers.詹妮是一个认真的女孩。她做任何事情都非常仔细。她经常关心他人。,5.Asthecandleburns,itusesupoxygenintheair.当蜡烛燃烧的时候，需要消耗空气中的氧气。,as在此为“当的时候”。它有着多重意义。PleasedoitagainasIdid.请像我做的那样再做一遍。（像一样）Asitislate,Ihavetoleavenow.由于天太晚了，我得走了。（由于，因为）Youwillfindthebuildingasyoureachtheendofthestreet.当你走到这条街那头，你就会看到那座大楼。（当时候）,useup用光，耗尽。表示完全，彻底。Hewashungryandateupthebread.他饿了，把面包全吃光了。（eatup吃光）Jimuseduphismoneytobuythecomputer.吉姆为了买电脑花光了所有的钱。,6.Thewaterinsidethejarthenrises.这时瓶子里的水就会上升。risev.上升，升起（不及物）Thesunrisesintheeast.太阳从东方升起。Theriverisrisingaftertheheavyrain.大雨后河水上涨。注意：raise“提高，升起”（及物）LiuFeiraisedherhandandaskedaquestion.刘菲举手问了一个问题。,7.*Thereisaboutonefifthoxygenintheair,sothewaterrisesandfillsaboutone-fifthofthejar.氧气在空气中占五分之一，所以水面上升并且占据了瓶子的五分之一。*分数的表达：,分数=,分子,分母,基数词,序数词,1,序数词,1,序数词+s,e.g.1/3，onethird1/5,onefifth3/4,threefourths2/5,twofifths,Post-reading,Letsdoit,Finishtheexercisesonpage69andcheckthem.,1.Thewaterhereiss_,notdeep.2.Letthefireb_forafewhours.Theroomwillbeverywarm.3.Look!Theboyisplayingwithsome_(火柴).4.Thereislittle_(氧气)atthetopofthemountains.5.Mr.Blacksatdownand_(点燃)acandle.,I.根据首字母或汉语提示，完成下列句子。,lit/lighted,hallow,urn,matches,oxygen,Practice,1.Pleasepassmethebottlefull_water.2.Heissohungrythathehaseaten_allthefoodontheplate.3.Iusuallyputthecandle_thecandleholder.4.Mr.Gaocameintotheclassroom_abookinhishand.5.Therainydaywilllast_threedays.,II.用适当的介词填空。,for,of,up,in,with,1.当蜡烛停止燃烧时，它已用光了空气中所有的氧气。Whenthecandle_,it_alltheoxygenintheair.2.我们班里五分之三是女生。_ofthestudentsinourclassaregirls.4.为了