Welcome to my class !,Made by Su Yaping,Lesson 26,Keep the Candle Burning,Unit 5 Look into Science,本节课的主题是:科学实验-蜡烛在 空气中燃烧，这是个学生特别感兴趣的实 验，有利于激发学生学习英语的热情。在 实际的教学活动中，我将和同学们一起动 手做实验，并用英语描述操作过程，真正 做到学以致用。,教材分析,根据新英语课程标准及教材要求，结合学 生的实际情况，我将教学目标分为以下几个方面：知识目标：学生要掌握本节课中出现的新单 词、短语及分数的英语表达。 能力目标：培养学生听、说、读和动手操作能 力。 情感目标：培养学生学习科学的兴趣，激发学生学习英语的积极性，提高他们的合作交流能力。,教学目标,重点： 依据教学目标及学生的学习 能力，要学生掌握本节课新学的单词、 短语及重要句型。难点：根据英语描述，学生小组合 作，动手操作实验，并讨论得出科学的 实验结果。,教学重难点,为了顺利完成教学目标、突出重点、突破难 点，结合学生的认知规律，我主要采用了图片展示、 实物演示、合作探究等教学方法。,教学方法,教学过程,合理安排教学过程是教学成功的关键，针对 学生的认知状况及本课的特点，我设计了以下几 个环节：,What is happening ?,The force of the air keeps the water in the jar.,We have discovered that the air pressure helps the cardboard hold the water in the jar.,Warming-up,Learning aims and important points,Learning Aims 1.Knowledge Aims:Master the words and phrases in this lesson 2.Ability Aims:Learn how to describe the science experiments 3.Emotion Aims:Lead Ss to be interested in science research Learning Important Points:Describe (描述) and explain（解释） the experiment in English,Today we are going to look into science again and learn to do another experiment. What experiment will we do?,Keep the Candle Burning!,a candle,a candle holder,a big glass jar,a shallow dish with water,matches,oxygen,What do we need?,New words and phrases,1. Put the candle in the candle holder.,2. Put the candle holder in the dish.,4. Light the candle.,How do we do the experiment?,观 察 领 悟,3. Fill the dish half full with water.,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.,观 察 领 悟,Lets do the experiment !,First， put the candle in the candleholder.,Second , put the candle holder in the dish.,Third , fill the dish half full with water.,Fourth , light the candle.,Fifth ,let the candle burn for two or three minutes.,Sixth , carefully put the jar over the candle untilthe top of the jar rests on the dish.,Seventh, look at the water in the jar.,1. What makes the candle burn?Oxygen .make/let sth./sb. do 使某物/某做.Eg: Let the candle _(burn) for two or three minutes.I make the student _(go) out.,Language Points,课内探究,burn,go,2.Why did the candle stop burning? Is there any oxygen in the jar?,Because it has used all the oxygen in the air. No ,there isnt.use up eat up drink up Eg: I have _ the water in the bottle.He has _ the bread.She has _ the water.,课 内 探 究,Language points,used up,eaten up,drunk up,What is happening?,阅读共品,Listen to the tape .Then read “what is happening “in the text and think about the following questions.,1.How far did the water rise? 2. Why does the water fill about one fifth of the jar?,One fifth.,1.How far did the water rise?,口诀： 分子基数，分母序，分子 1 ,分母加 S,three fourths three quarters,one (a) quarter one fourth,one third,a (one) half one second (one-second),Think about it !,总 结 提 高,2. Why does the water fill about one fifth of the jar?,Because about one fifth of the jar is made up of oxygen.,Think about it !,拓展延伸,What does this experiment showabout air?It proved (证明)that there is _ oxygen in the air,one - fifth,Discussing !,拓展探究,There are lots of matchs in the small box. Can you let my uncle laughing? There is about onefive oxygen in the air. There are about twothird students in the classroom. 5. I used out my money. Can youlend me some?,Correct the mistakes.,matches,laugh,one-fifth,two-thirds,up,当堂检测,Summary New words: match, light, burn, shallow, candleholder, oxygen (2) Phrases: use up, one-fifth (3) Sentences: Fill the dish half full of water. As the candle burns, it uses up oxygen in the air.Hom ework 1. Do and describe this experiment to your family. 2. Write the experiment that you have learned in this unit.,Summary and Homework:,Thank you,bye!,