1、Lesson 26Keep the Candle BurningThink about it!1.Do you think science is interesting?Why or why not?2.Name one or two famous Chinese scientists.What do you know about them?Today we are going to look into science again and learn to do another experiment.What experiment will we do?Keep the Candle Burn
2、ing!1.What do we need?a candle a big glass jara candleholder a shallow dish with water matches a match2.How do we do the experiment?3.What is happening?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。3)one(a)half 或 one second(one-second)=one(a)quarter 或 one-quarter分数的英语
3、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/one half (one second)one-third one quarterthree-fourths three quarterstwo-fifthsnine-tenths1.There are lots of matchs in the small box.2.Can you let my uncle laughing?3.Youre very ill,so you must stop to smoke.4.Fill the dish half fill of water.5.Ther
4、e is about onefive oxygen in the air.6.There are about twothird students in the classroom.7.I used out my money.Can you lend me some?Correct the mistakes.matcheslaughsmokingfullone-fifthtwo-thirdsup用所给单词的正确形式填空。1.You are very tired.Youd better stop _(have)a rest.2.What do you use to make a candle _(
5、burn)?3.You should put the jar over the candle _(careful).4.What _(observe)can you make?to haveburncarefullyobservation(s)5.Please cut the apple into _(half).6.He _(light)a candle and the room was bright.7._(two),ask the students to guess what will happen.8.He kept the candle _(burn)for two hours.9.
6、Its time _(play)basketball.10.What about _(go)for a walk?halveslighted/litSecondburningto playgoing请根据课文内容,以“An InterestingExperiment”为题写一篇小作文。Can an egg“swim”in the water?1.What do we need?Do an experiment：First,_.put some salt into the glassThen,_.add some waternext,_.mix the salt and the water togetherFinally,_.put the egg into the glassThe egg cant touch the bottom of the glass and it swims in the water.3.What is happening?4.Why?盐水的密度变大，鸡蛋的浮力大于重力。
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