1、学习目标objectives1.掌握巩固新单词holder,shallow,lighter,match,examine,oxygen 掌握新短语:use up，be made up of,one-fifth2.了解实验过程和实验原理Wordsholdern.支托物；持有者shallowadj.浅的lightern.打火机；点火器matchn.火柴 v.相配examinev.检查oxygenn.氧气1.The water here is s_,not deep.2.The doctor e_the girl carefully and said there was nothing wrong w
2、ith her.3.Look!The boy is playing with some _(火柴).4.There is little _(氧气)at the top of the mountains.5.Mr.Black sat down and _(点燃)a candle.I.根据首字母或汉语提示，完成下列句子。lit/lighted hallow xaminedmatchesoxygenPracticeWhen the candle stops burning,it has used upall the oxygen知识点一：Use up 用光You shouldnt use up al
3、l your money.When you use it up,you can call me.知识扩展：eat up,drink up,burn up知识点二：About one fifth of the air is made up of oxygen.be made up of:由组成Our football team is made up of 11 students.知识扩展：be made of“由.制成”看得出原材料This desk is made of woodbe made from“由.制成”看不出原材料The wine is made from grapes.be ma
4、de in“在.生产”产于某地These computers are made in Guangzhou.知识点三：When the candle stops burning,it has used up all the oxygenStop doing 停止做某事When the teacher came in,all the student stopped talking.知识点四：There is about one fifth oxygen in the air.*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_ _ _注：“分数+of+名词”作主语时，谓语动词的单复数与o
5、f 后的名词单复数相一致。Two fifths of the students in our class are girls三分之一one third三分之二two thirdsattention：二分之一：a/one half(不说：one second)四分之一：a/one quarter(还可说：a/one quarter)四分之三：three-fourths three quartersDo some exercises三分之二五分之三two-thirdsthree-fifths四分之一one-quarter九分之四four-ninthsExercises:1.The T-shirt
6、_the blue skirt.They fit you very well.A.expresses B.matches C.compares D.goes2.Our earth_ seas and land.A.is made of B.is made from C.is made inD.is made up of3.There are many students in our school._of them _girls.(黑龙江齐齐哈尔)A.One third;is B.One third;are C.Two thirds;is4.Danny _his money and had to
7、 go home.A.Ate up B.put up C.used up D.turned up5.Stop_about the traffic.Just think about what we can do to improve it(上海)Aplain B.to complain C.complaining D.complainedWhat do you need?l a candlela candle holderla big glass jarla shallow dishlsome waterla lighter or matchesWhat do you do?1.Put the
8、candle in the candleholder.2.Put the candleholder on the dish.3.Fill the dish half full with water.4.Light the candle.5.Let the candle burn for two or three minutes.6.Carefully put the jar over the candle until the top of the jar rests on the dish.7.Examine the water in the jar.What can you see?Thin
9、k about itlWhy did the candle stop burning?lHow far does the water rise?Why?Because the candle has used up all the oxygen in the air.It rises about one-fifth of the jar.Because about one fifth of the air is made up of oxygenlWhy did the water rise?Because the force outside the jar is stronger than t
10、he force inside the jar.Listen to the tape and read after it!Writing time _the candle burns,it uses the oxygen in the air.When the candle stops _,it has _ all the oxygen in the air.The water inside the jar _ and fills about _ of the jar.This is because about one fifth of the jar is made up of oxygen.Asburningused uprisesone fifthHomework1.Express this experiment in English2.Do our exercise book Lesson 26.Homework
