Unit 5 Lesson 25 Let's Do an Experiment-【绿卡初中创新题】2025-2026学年九年级上册英语同步教案(冀教版)河北专版

Unit 5 Look into Science 课时 Lesson 25: Let’s Do an Experiment! 课型 新授课 教学目标 1. 知识目标 掌握单词：correct, method, force 接触单词：experiment, jar, upside, pour, scientific, raincoat, pressure, conclude 短语：turn...upside down, pour out, scientific method, take...off 2. 能力目标 (1)掌握本课所学的单词和英语表达； (2)能用英语描述实验的过程。 3. 情感目标 养成用科学的思维方式来分析生活中的现象。 教学重点 掌握本课所学的单词和英语表达。 教学难点 能用英语描述实验的过程。 教学准备 PPT课件；本课节用到的音频。 教 学 过 程 Step 1 Warming up Sing a song. Ask: Do you like science? (Yes./No.) What is science？Now, let’s sing a song What Is Science? along with the music. What Is Science? ( What is science? Can you explain? Please make it easy for my brain It’s about matter—the universe. Why does a car stay on the road? Why is there green all over a toad? Why can’t I carry a heavy load? That’s just science. ) ( What is science? Can you explain? Please make it easy for my brain. It’s about making observations. Why do onions make me cry? Why do clouds go by? What keeps the birds in the sky? That’s just science. ) Step 2 Presentation 1. Teach the new words experiment, correct, conclude and expressions scientific method with the pictures by talking about them. Teacher says: Look! What’s the man doing? (He is doing an experiment.) By doing the experiment, we can test if the things are correct or wrong. So it is the scientific method. And with the scientific method, we can conclude the right result. 2. Teach the new words jar, pour and expressions turn... upside down, pour out with the pictures by talking about them. Teacher asks: Look! What’s this? It’s a jar. And it’s right side up. There’s some water in it. Now, let’s turn it upside down. The water pours out. Right side up正面朝上 turn... upside down把……翻转；倒过来 3. Teach the new words raincoat with the picture and another two new words force, pressure. raincoat /ˈreɪnkəʊt/ n.雨衣 force /fɔːs/ n.力量 v. 迫使；强迫 pressure /ˈpreʃə/ n. 压力，压强；挤压 4. Get the class to read the new words following the recording, and read the expressions alone. Then remember them. experiment n. 实验；试验 jar n. 广口瓶；罐子 upside n. 上部；上边 pour v. 倒出；倾倒 correct adj. 正确的；恰当的 scientific adj. 科学的 method n. 方法；办法 raincoat n. 雨衣 force n. 力量 v. 迫使；强迫 pressure n. 压力，压强；挤压 conclude v. 得出结论；断定 turn...upside down 把……翻转；倒过来 pour out 涌出 scientific method 科学方法 take...off 把……拿开 Step 3 Listening and answering Get the class to listen to the dialogue and answer the question. What are Danny, Jenny and Brian doing in the lab? Answer: They’re doing an experiment. Step 4 Reading 1. Fast-reading Get the class to read the passage fast and answer the questions. (1) What’s Danny’s theory? (2) What’s Jenny’s theory? Answers: (1) Danny thinks the water will pour out, the floor will get wet. (2)Jenny thinks the water will stay in the jar, the cardboard will hold the water. 2. Careful-reading Get the class to read the lesson and answer the questions. (Let’s Do It! No. 1) (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? Answers: (1) He thinks that they should do the experiment outside. (2) The force of the air. /The air pressure. (3) Yes, she is. She is so sure of her theory that Brian can do the experiment over Danny’s head and he won’t get wet. (4) Because he thinks he will get wet. (5) Air is stronger than he thought. 3. Get the class to read the dialogue and find the following expressions. Then translate them into Chinese. do an experiment做实验 fill...with...把……装满…… cover...with...用……盖住…… turn…upside down把……翻转；倒过来 take...off把……拿开 get wet变湿 pour out涌出 scientific method科学方法 be sure of确信 so...that... 如此……以至于…… put on穿上 adj./adv.+ enough to do sth. 足够……可以做某事 Step 5 Reading and saying Get the class to read the dialogue and say out how to do the experiment according to the pictures. Step 6 Exercises 1. Read the experiment. Put the sentences in the correct order. (Let’s Do It! No. 2) □Put a piece of cardboard over the jar. □The jar of water is upside down, but the water stays in the jar. This is because air pressure pushes the cardboard onto the jar. □Fill the glass jar with water. □Turn the glass jar over quickly. Hold your hand on the cardboard for a few seconds. □Remove your hand from underneath the jar. What happens? □There is more air outside the jar than inside, so there is more air pressure outside than inside. Answers: (2 5 1 3 4 6) 2. Let’s have a try. (Let’s Do It! No. 3) Try to do the experiment in this lesson yourself. Task tips: What happens when you use less water, more water, wet cardboard, or different kinds and sizes of jars? Step 7　Summary Sum up what we’ve learnt in this period with the class. 1. 本课所学的词汇 turn...upside down 把……翻转；倒过来 pour out涌出 scientific method科学方法 take...off把……拿开 2. 如何做实验 Step 8 Language points 1. Let’s do an experiment.咱们做个实验吧。 experiment ① n. 实验；试验 do experiments/do an experiment 做实验 We often do experiments in the lab. 我们经常在实验室里做实验。 ② v. 做实验；进行实验 常与介词on，with连用，来表示“试验……，试用……”。 Let’s experiment with the machine.咱们试一下这台机器吧。 2. Then I turn the jar upside down and take my hand off the cardboard. 然后，我将广口瓶倒置并将我的手从纸板上拿开。 (1) turn...upside down 把……翻转；倒过来(=turn over) upside down正面朝下 right side up 正面朝上 He turned the bottle upside down and poured the water inside. 他把瓶子倒过来，倒出里面的水。 You hold the book upside down. 你把书拿倒了。 (2) take…off… 把……从……拿开 Please take the pen off the newspaper.请把钢笔从报纸上拿走。 Don’t take your hand off the jar.不要把手从广口瓶上拿走。 【拓展】take off 摘下(眼镜、戒指等)；脱下(衣、帽、鞋等)； (飞机等)起飞 He took off his glasses and cleaned them. 他摘下眼镜，把它擦干净。 Don’t take off your coat. It’s cold outside. 别脱下你的外套，外面冷。 The plane will take off in ten minutes.飞机将在10分钟后起飞。 3. You think the water will pour out, Danny. 你认为水会撒出来，丹尼。 pour out 涌出；倒出；使流出 其中，pour用作动词，意为“倒出；倾倒”。 Look! The thick smoke is pouring out. 看！浓烟正在涌出。 Let me pour out the tea for you. 让我为你倒茶吧。 【拓展】pour …into…把……倒进…… Pour the milk into the blender. 把牛奶倒进搅拌器。 4. Let’s test which theory is correct. 让我们检验一下哪一个理论是正确的。 correct ① adj. 正确的；恰当的(=right) correct/right answer 正确的答案 Your answer is not correct/right. 你的答案不对。 ② v. 改正；纠正；矫正 Correct your mistakes. 纠正你的错误。 5. The force of the air keeps the water in the jar. 空气的力量使水保持在广口瓶里。 force ① n. 力；力量 the force of… ……的力量 The force of the explosion blew out all the windows. 爆炸的冲击力把所有窗户都震碎了。 ② v. 迫使；强迫 force sb. to do sth. 迫使某人做某事 It’s impolite to force others to do something unpleasant. 迫使他人做令人不高兴的事情是不礼貌的。 课堂作业 1. Remember the new words and expressions learnt in this lesson. 2. Write a passage about how to do an experiment. 3. Preview Lesson 26. 板书设计 UNIT 5 Look into Science Lesson 25: Let’s Do an Experiment! correct, method, force, experiment, jar, upside, pour, scientific, raincoat, pressure, conclude 1. 短语： turn...upside down 把……翻转；倒过来 pour out 涌出 scientific method 科学方法 take...off 把……拿开 2. 如何做实验 学科网（北京）股份有限公司 $$