Lesson26KeeptheCandleBurningThinkaboutit!1.Doyouthinkscienceisinteresting?Whyorwhynot?2.NameoneortwofamousChinesescientists.Whatdoyouknowaboutthem?Todaywearegoingtolookintoscienceagainandlearntodoanotherexperiment.Whatexperimentwillwedo?KeeptheCandleBurning!1.Whatdoweneed?acandleabigglassjaracandleholderashallowdishwithwatermatchesamatch2.Howdowedotheexperiment?3.Whatishappening?ReadthetextReadthetextsilentlyandsilentlyandfinishEx.1finishEx.11)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。3)½＝one(a)half或onesecond(one-second)¼=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口诀:分子基，分母序。分子﹥1，分母加s。a/onehalf(onesecond)one-thirdonequarterthree-fourthsthreequarterstwo-fifthsnine-tenthsCananegg“swim”inthewater?1.Whatdoweneed?Doanexperiment：First,_________________________.putsomesaltintotheglassThen,_______________.addsomewaternext,______________________________.mixthesaltandthewatertogetherFinally,______________________.puttheeggintotheglassTheeggcan’ttouchthebottomoftheglassanditswimsinthewater.3.Whatishappening?4.Why?盐水的密度变大，鸡蛋的浮力大于重力。1.Therearelotsofmatchsinthesmallbox.2.Canyouletmyunclelaughing?3.You’reveryill,soyoumuststoptosmoke.4.Fillthedishhalffillofwater.5.Thereisaboutone–fiveoxygenintheair.6.Thereareabouttwo–thirdstudentsintheclassroom.7.Iusedoutmymoney.Canyoulendmesome?Correctthemistakes.matcheslaughsmokingfullone-fifthtwo-thirdsup用所给单词的正确形式填空。1.Youareverytired.You’dbetterstop______(have)arest.2.Whatdoyouusetomakeacandle_____(burn)?3.Youshouldputthejaroverthecandle________(careful).4.What____________(observe)canyoumake?tohaveburncarefullyobservation(s)5.Pleasecuttheappleinto______(half).6.He_________(light)acandleandtheroomwasbright.7.______(two),askthestudentstoguesswhatwillhappen.8.Hekeptthecandle_______(burn)fortwohours.9.It’stime______(play)basketball.10.Whatabout_____(go)forawalk?halveslighted/litSecondburningtoplaygoing请根据课文内容,以“AnInterestingExperiment”为题写一篇小作文。
