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1、梅州市学艺中学 熊思秀_ Taught by Xiong SixiuLesson 25 Lets Do an Experiment! science 科学 experiment 实验;试验 theory 理论;学说 fill 装满 jar 广口瓶; 罐子 upside 上部;上边 prove 证实; 证明 observe 观察;监视 scientific 科学的 method 方法; 办法Think about it.1.Do you like to do experiments? 2.What did you want to know bymaking the experiment? 3.W
2、hat experiments have you done? 4. Did you finish it successfully?*Why does Danny say they shoulddo this experiment outside?*What will Brian do?*Does Danny have the same theoryas Brians? * Whats Brians theory?Questions1. Whats the meaning of the word “theory”?2.Whats the meaning of the word “experime
3、nt”?3.What does Brian do about the experiment at first ?4.Why does Danny want to do the experimentoutside?5.Will Brian do the experiment inside?What does Jenny say?Listen again and answer more questions1. Whats the meaning of the word “theory”?A “theory” is an idea.2.Whats the meaning of the word “e
4、xperiment”?An “experiment” shows what happens.Listen again and answer more questions3.What does Brian do about the experiment at first ?He read about the experiment. He filled the jarwith water,covered the top with a piece of cardboard, and then he turned it upside down. Listen again and answer more
5、 questions4.Why does Danny want to do theexperiment outside?Danny is not sure whether the floor willget wet?Listen again and answer more questions5.Will Brian do the experiment inside?Yes. He is sure the floor wont get wet.6.What does Jenny say?Lets do the experiment and see what happens.Listen agai
6、n and answer more questionsListen and repeatListen and repeat thethetext carefully. text carefully.Main Sentences 1. I fill a jar with water. 我用水把瓶子装满。fill with用装满He has filled his case with many books. 他已经把书装满了箱子。coverwith 用盖住2. I turn the jar upside down. 我把广口瓶倒置。upside down 的意思是“向下翻转过来”. You hold
7、 the book upside down. 你把书拿倒了。 right side up 是“正面朝上”的意思be sure +that 从句表示“认为一定” 而be not sure 表示不确定.e.g. Im sure she will come here. 我确信她会来。Im not sure when hell come here. 我不能肯定什么时候来这儿。3. Im sure the floor wont get wet. 我确信地板不会湿。4. Well do the experiment and observed what will happen.我们将做这个实验并观察会发生什
8、么情况。observed 动词, “观察”。observe sb. do/ doing sth. 如：I observed her dance. When I passed by the grass, I observed him Walking.ReadRead the textthe text together loudly.together loudly.Lets do an interesting experiment. First, I _ a jar _a desk, _it _ water, then _the top _ a piece of cardboard. When I
9、 _the jar _ _, can you guess what will happen? putonfill withcoverwith turn upsidedownWork in groups and think of this experiment . Discuss it and write down how we did it.Step 1 Preparation:Make a list of the materials and tools that we were used in the experiment.Step 2 Theories: Write down two di
10、fferent theories. 1. The floor will get wet.2. The floor wont get wet.Water,a jar , a piece of cardboard.Step 3 Main steps: Write down the steps of doing the experiment 1. Fill a jar with water. 2. Cover the top with a piece of cardboard. 3. Turn the jar upside down. Step 4 Result: Write down the re
11、sult of the experiment. The force of air will keep the water inthe jar.A balloon is full of air. If we pierce(刺破) it with a needle, it will break with a loud bang. But if we put a piece of glue on the balloon and do the same experiment, what will happen?Surprisingly, we wont hear the same sound. The
12、 balloon will become smaller and smaller. We will feel that the air is running out slowly through the pinhole(针孔). We know the balloon is made ofrubber(橡胶). When the balloon is pierced, the air leaving the balloon forms a kind of force. Rubber is so thin that it cant support(支撑) such force. So the b
13、alloon breaks quickly with a loud bang. But the glue is different. Its strong enough to support the force of the air. People have learned something from this experiment.They have used this method to make tires(轮胎).请根据课文内容,以 “An InterestingExperiment”为题写一篇小作文。Thank you for your presence and guidance!Good-Bye
