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1、 Lesson 25 Lesson 25 Lets Do an Experiment!Lets Do an Experiment!Learning aims:1.知识目标:Learn the words and expressions2.能力目标:Do and express the experiment3.德育目标:Love science science 科学科学 experiment 实验实验;试验试验 theory 理论理论;学说学说 fill 装满装满jar 广口瓶广口瓶; 罐子罐子 upside 上部上部;上边上边prove 证实证实; 证明证明 observe 观察观察;监视监视
2、scientific 科学的科学的 method 方法方法; 办法办法自主学习：自主学习：一根据课文内容回答问题。1. What do you need? A piece of cardboard, a jar, some water 2. What do you do? Fill a jar with water, cover the top with a piece of cardboard. Then, turn the jar upside down and take your hand off. 3. What is happening? The cardboard holds th
3、e water in the jar.Lets Do the Experiment!Read and answer:1. Where does Danny think they should do the experiment? 2. What keeps the water in the jar? 3. Is Jenny sure of her theory? How do you know? 4. Why does Danny put on his raincoat? 5. What does Danny conclude? Outside.The force of the air.Yes
4、, she is.He is afraid to get wet.The air is stronger than he thought.Work in groups!一、一、I fill a jar with water. 我用水把瓶子装满。我用水把瓶子装满。 fill with 用用装满装满 (主语是人主语是人) be full of / be filled with (主语是物或容器主语是物或容器)同义句转换。同义句转换。1.The rooms are full of the students now. The rooms _ _ _ the students now.2.My pock
5、et is filled with the money. My pocket _ _ _ the money. 选择。选择。5. Can you _ the box _ books? ( ) A fill ,with B full ,with C filled ,with D full , in6.The child _ all the cups _ water.( )A fill,with B fills, with C is full ,with D is filled ,with are filled with is full of AB二二. I turn the jar upside
6、 down. 我把广口瓶倒置。我把广口瓶倒置。upside down 的意思是的意思是“向下翻转过来向下翻转过来”. You hold the book upside down. 你把书拿倒了。你把书拿倒了。turn upside down同义词同义词 turn overright side up 是是“正面朝上正面朝上”的意思的意思三、三、 Im sure the floor wont get wet. 我确信地板不我确信地板不会湿。会湿。be sure 表示肯定表示肯定, 有把握有把握,而而be not sure 表示不确定表示不确定be sure/ be not sure 后可接句子，后
7、可接句子，还可接代词、名词、还可接代词、名词、动名词或不定式。动名词或不定式。常见用法：常见用法： be sure of sb / doing sth , be sure to do sth be sure that完成下列各题。完成下列各题。1.我确信她会来。我确信她会来。_that she will come here.2.他没有把握通过考试他没有把握通过考试_to past the exam.3.Im sure _ Jim plays basketball well .A of B to C that D withIm sureHes not sureC四、Write down the
8、steps of doing the experiment and report in class.First, fill a jar with water.Then , cover the top with a piece of cardboard. Finally, turn the jar upside down.PRACTISE. . practise He _ the bags _ christmas presents. （用（用装满）装满） Please pass me a bottle _ water.A. full with B. filled of C. filling wi
9、th D. full of My mother is holding the book _ _ . （倒着）（倒着）4.我弟弟用一块玻璃盖住了那个杯子。我弟弟用一块玻璃盖住了那个杯子。My brother _ the glass _ a piece of glass. 我肯定他会来。我肯定他会来。_ _ _ he will come. filledwithDupside downcoveredwith I am sureNew words:science scientific experiment fill prove method theory jar observe Phrases :be filled with be full of cover with turn upside downbe sure of sb / doing sth , be sure to do sth sb. be sure +that 从句从句SUMMARY Write about the experiment. Finish off the exercises of this lesson.HOMEWORKThank you for your listening! Goodbye!
