1、5Its a burning candle.make the candle burn=light the candleburn-burned/burnt-burned/burntlight-lighted/lit-lighted/lita candleholdera matchmatchesmatchcandle holder n.There is about 20%oxygen in the air.a shallow disha deep bowlone-fifthmatch n.火柴;比赛light v.点燃;使燃烧burn v.燃烧shallow adj.浅的candleholder
2、n.蜡台;烛台oxygen n.氧气one-fifth 五分之一1.The water here is s_,not deep.2.Let the fire b_ for a few hours.The room will be very warm.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 urnma
3、tchesoxygenPracticea candlea big glass jara candleholdera shallow dish with watermatchesHow do we do the experiment?1).Put the candle in the candleholder.2).Put the candleholder in the dish.3).Fill the dish half full of water.4).Light the candle.5).Let the candle burn for two or three minutes.Put th
4、e candle in the candleholder.Put the candleholder in the dish.Fill the dish half full of water.Light the candle.The candle stops burning.The water in the jar rises.What will happen?How do we do the experiment?1).Put the candle in the candleholder.2).Put the candleholder in the dish.3).Fill the dish
5、half full of 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).Look at the water in the jar.First._the candle _the candleholder.Then._the candleholder _the dish.Third._the dish _water.Fourt
6、h._the candle.Fifth._the candle _for two or three minutes.Sixth._the jar _ the candle until the top of the jar _ the dish.How do we do the experimentputputininFillhalf full ofLightletburnputrests onoverPair workWhat do you need?We need _.What do you do?First,_.Second,_.Then,_.What is happening?_.Que
7、stions:(问题追击)Why did the candle stop burning?Why did the water rise?How far did the water rise?Why?Because there was _oxygen in the jarThe force inside the jar is _ than the force inside the jar.It rose about _of the jar.Because there is one-fifth oxygen in the_.nostrongerone-fifthjar Jim used up hi
8、s money to buy the computer.1.As the candle burns,it uses up oxygen in the air.use up“用尽(材料)，设法利用(剩余的材料或时间)”eat up “吃光”drink up “喝光”She was hungry and ate up the bread.He drank up all the water.2.There is about one-fifth oxygen in the air,so the water rises and fills about one-fifth of the jar.one-f
9、ifth “五分之一”two-fifths “五分之二”three-fourths “四分之三”口诀：分子基，分母序。分子1，分母加 s母叙（序）子饥（基）二分之一四分之一四分之三a/one half (不说：one second)three-fourthsthree quartersa/one fourth（还可说：a/one quarter）三分之二 五分之三 四分之一 九分之四 十二分之一 two-thirds three-fifthsfour-ninths one-twelfthone quarterCorrect the mistakes:1.There are lots of ma
10、tchs 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.There is about one five oxygen in the air.6.There are about two third students in the classroom.7.I used out my money.Can you lend me some?matches_laugh _smokingone-f
11、ifth _full_two-thirds_upSummary Words:match，light，burn，shallow candleholder，oxygen，one-fifth Phrases:use up,make/let/havedo.stop to do sth.stop doing sth.How to describe the experiment?1.Please pass me the bottle full _ water.2.He is so hungry that he has eaten _ all the food on the plate.3.I usuall
12、y put the candle _ the candleholder.4.Mr.Gao came into the classroom _ a book in his hand.5.The rainy day will last _ three days.II.用适当的介词填空。forofupinwithHomework:1.Further experiment：（实验拓展）When two candles burn in the jar,what will happen?Do it with your partners after class.2.正式：练习册1、2题。Scientific experiment is endless.科学实验无止境。Goodbye!
