Lesson26KeeptheCandleBurning

Thinkaboutit!Doyouthinkscienceisinteresting?Whyorwhynot?2.NameoneortwofamousChinesescientists.Whatdoyouknowaboutthem?,Todaywearegoingtolookintoscienceagainandlearntodoanotherexperiment.Whatexperimentwillwedo?,KeeptheCandleBurning!,Lesson26,KeeptheCandleBurning,1.能正确理解运用重点单词、短语和句型。（重点）2.通过听、读、自主学习、教师示范点拨、合作探究及课堂练习来来掌握新知识、突破重难点。（难点）。3.研究科学，培养学生细致观察的能力，严谨的科学态度。4.积极思考并主动参与小组活动。,Learninggoals（学习目标）,1.Whatdoweneed?,acandle,acandleholder,abigglassjar,ashallowdishwithwater,amatch,matches,lighter,match,1.Howdowedotheexperiment?2.Whatishappening?,ReadthetextsilentlyandfinishEx.1,Languagepoints,1.halffull半满2.lightthecandle点燃蜡烛3.twoorthreeminutes两三分钟4.useup=runoutof用完5.onefifth五分之一6.bemadeupof由组成,口诀:子基母序，子多母复1)分数由分子及分母两部分构成。用英语表达时，分子用基数词，分母用序数词。2)若分子为1，则分母的序数词为单数形式，若分子大于1，则分母的序数词用复数形式。one(a)half或onesecond(one-second)=one(a)quarter或one-quarter,分数的英语表达,二分之一三分之一四分之一四分之三五分之二十分之九,a/onehalf(onesecond)one-thirdonequarterthree-fourthsthreequarterstwo-fifthsnine-tenths,matchn.火柴,比赛(pl.)matchesV.相称，相配Hisscarfhiscoat.Wehopetowinnext.Arethereanyinthebox?,matches,match,matches,light【C】灯，【U】光线，光v.点燃-lightern.打火机Wsmuchfasterthansound.Remembertoturnoffthewhenyouleavetheclassroom.,lighter,light,Light,lights,Cananegg“swim”inthewater?,1.Whatdoweneed?,Doanexperiment：,First,_.,putsomesaltintotheglass,Then,_.,addsomewater,next,_.,mixthesaltandthewatertogether,Finally,_.,puttheeggintotheglass,Theeggcanttouchthebottomoftheglassanditswimsinthewater.,3.Whatishappening?,4.Why?,盐水的密度变大，鸡蛋的浮力大于重力。,Therearelotsofmatchsinthesmallbox.Canyouletmyunclelaughing?Youreveryill,soyoumuststoptosmoke.Fillthedishhalffillwithwater.Thereisaboutonefiveoxygenintheair.Thereareabouttwothirdstudentsintheclassroom.7.Iusedoutmymoney.Canyoulendmesome?8.Cloudsaremadeofsmalldropsofwater.,Correctthemistakes.,matches,laugh,smoking,full,one-fifth,two-thirds,up,aremadeupof,用所给单词的正确形式填空。Youareverytired.Youdbetterstop_(have)arest.2.Whatdoyouusetomakeacandle_(burn)?3.Youshouldputthejaroverthecandle_(careful).,tohave,burn,carefully,4.Pleasecuttheappleinto_(half).,halves,5.Three_(four)ofmyclassmates_(wear)glasses.,fourths,wear,6.He_(light)acandleandtheroomwasbright.7._(two),askthestudentstoguesswhatwillhappen.8.Hekeptthecandle_(burn)fortwohours.9.Thesun_(rise)intheeast.10.Itstime_(play)basketball.11.Whatabout_(g