冀教版九年级Lesson26张燕.ppt

Come on !!Lesson 26 Keep the Candle BurningLearning aims:1. The new words: match, holder, shallow, lighter, examine, oxygen 2. The phrases: use up be made up of one-fifth3. sentences (1) When the candle stops burning, it has used up all the oxygen in the air. (2) Because about one fifth of the air is made up of oxygen , the water rises and fills about one fifth of the jar.4. Describe and explain the experiment in English.  match (复数复数)----__________n. 火柴火柴;比赛比赛 use upbe made up ofone--fifthshallow adj.浅的浅的 (反义词反义词））________examine v.检查检查 _________________ n. 检查，考试检查，考试holder n.支托物支托物 lighter n.打火机打火机 _____ v. 点燃（过去式点燃（过去式__________）） oxygen n. 氧气氧气matches用完；用光；用完；用光；五分之一五分之一deep由由…… 组成组成examination (exam)lighted/litlightHave a tryExercises:一 英汉互译。

___________用光 __________ one-fifth ___________由……组成 ____________一个烛台二 填空1. Mother used a ______ to ______(light) a candle and the room was bright.2. Please pass me a box of_________ (match).3. Please e______ your car carefully before you start it.4. Plants and animals cannot live without o______.5. “Deep” is opposite of “s_______”. use up五分之一 be made up oflightmatcheslighterxaminexygena candle holderhallowListen and fill in the blanks.matchletusesburningrisesone fifthLet’s do the experiment. First. _____the candle ____the candleholder.Then. _____the candleholder ____the dish.Third. _____the dish ___________water .Fourth. ______the candle .Fifth. ______the candle ______for two minutes .Sixth.carefully____the jar_____the candle until the top of the jar_____on the dish. Examine the water in the jar. What can you see?How do we do the experiment? putputoninFillhalf full withLightletburnputoverrestsThe candle stops burning and the water rises up.Think it over.Why did the candle stop burning?Why did the water rise?How far did the water rise? Why?What does this experiment show about air?Because it has_________ the oxygen in the air and there is____ oxygen in the jar.Because the force outside the jar is _________ than the force inside the jar.Because about ________the air _______________ oxygen, the water rises and fills about __________of the jar.It proved that there is _________ oxygen in the air.used upnostrongerone fifthone fifthone-fifthis made up ofLanguage points:1. As the candle burns, it uses up oxygen in the air.use sth. up “用尽用尽(材料材料)，设法利用，设法利用(剩余的材料或时间剩余的材料或时间)” She used up the chicken bones(骨头) to make soup.eat up “吃光吃光” drink up “喝光喝光” She was hungry and ate up the bread. He drank up all the water.Exercises:Don’t ________(use up/push up) all of the ink. Leave some for me. use up2. Because about one-fifth of the air is made up of oxygen , the water rises and fills about one-fifth of the jar.be made up of 由……组成Eg: Your life should be made up of happiness. All animals and plants are made up of cells.ExercisesThe medical team _____________(is made of/ is made up of) five experienced doctors.is made up of One - fifth four - fifthsone - third two - thirds分数表达法分数表达法分子基分子基分母序分母序分子大于分子大于 1分母加分母加 S1/5 4/5 1/3 2/3 基数词基数词序数词序数词分子分子分母分母Practise1/4one-fourth3/7three-seventhsQuiz1. Please ______the candle with a _______ to make it _____. 请用火柴点燃蜡烛让它燃烧。

2. My mother ________her money to buy clothing yesterday.我妈妈昨天买衣服花光(用光）了她身上所有的钱3. In our class,____________ of students are boys, _____________of students are girls. 在我们班，三分之二的学生是男生，三分之一的学生是女生4.He______ the bottle ______________ water. 他向瓶子里加入半瓶水5. Our team _____________ excellent workers. 我们的团队是由杰出的工人组成的used uptwo-thirdsone-thirdTry your best, My children!lightmatchburnfilledhalf full with is made up ofsummary1. Can you read the new words?(2分分) 火柴 支托物 浅的 打火机 检查 氧气 2. Can you use the phrases correctly?（（2分）分） use up, be made up of, one-fifth, 3. Do you know the sentences?（（3分）分） ① As the candle burns, it uses up oxygen in the air ② Because about one-fifth of the air is made up of oxygen , the water rises and fills about one-fifth of the jar.4. Can you describe and explain the experiment in English?（（3分）分）Do you think science is interesting? Why? Teacher’s words: Science is so interesting and weird! We love science. Study hard, you will be a scientist someday! If you think you can ,you can! you can!Homework 1. Do and describe this experiment to your family.2. Write the experiment that you have learned in this unit. Class is overThanks!Thanks!。