冀教版九年级英语Unit5 Lesson 26Keep the Candle Burning(共22张PPT).ppt

1、Lesson 26 Keep the Candle Burning!a candleWhat do we need todo the experiment?a candle holderholder/huld/支托物light(lit,lighted/lit,lighted)点燃，使燃烧a match/mt/matcheslighter /lait/打火机，点火器a big glass jar a shallow dish shallow/lu/浅的What do we need?.a candle .a candle _.a big glass _.a _ dish.some water.a

2、 _ or matchesholderjarshallowlighter How to do the experiment?1)Put the candle in the candle holder.2)Put the candle holder 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

3、jar rests(剩余）on the dish.7)Examine the water in the jar./igzmin /检查1.What is happening?2.What makes the candle burn?Oxygen /ksidn/氧气The water inside the jar rises.Think about itWhat is happening?As the candle burns,it uses the _ in the air.When the candle stops burning,it has _ all the oxgen in the

4、air.The water inside the jar rises.How far does the water rise?Because about _ of the air is _ oxygen,the water rises and fills about one fifth of the jar.oxygenused upone fifthmade up of 1.About one fifth of the air is made up of oxygen.be made up of 由.组成e.g.The team is made up of four girls.2.It h

5、as used up all the oxygen in the air.use up 用光e.g:I have used up the water in the bottle.拓展：eat up drink up121314343.How far did the water rise?分子基，分母序，分子 1,分母加 Sthree fourths three quartersone fourth a quarter one thirda halfAbout one fifth of the jar.e.g.Two thirds of the food iseaten up.One fifth

6、 of the students areinterested in English.Lets do the experiment!Task:Lets speak English Work in groups,describe the steps and the conclusion of the experiment in English.Read the lesson and fill in the blanks.Lets do the experiment together!Put the candle in the candle holder.Put the candle holder

7、on the dish.Fill the dish half full with water.Light the candle with a _ or a lighter.What can you see?The candle is burning._ the candle burn for two or three minutes.Then carefully put the jar over it until the top of jar rests on the dish.As the candle burns,it _ the oxygen in the air.matchLetuse

8、s upWhen the candle stops _,it has used up 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 air is made up of oxygen.burningrisesone fifthCircle the correct words to complete the sentences.1.Dont(use up/push up)all of the ink(墨水）.Leave some for me.2.The medical team(is made of/is made up of)five experienced doctors.3.Please fill the hole(with/in)sand and water.4.My brother wasnt(strong enough/enough strong)to lift the box.科学如此的趣味无穷，在你生活中，你一定做过许多小实验来验证它们的原理，请你把最有趣的那个写下来，让大家一起去实验吧！