Unit 7 How do things change？（课件）-2025-2026学年沪教版英语四年级下册

Unit 7 How do things change? 探索物质变化的奥秘，观察身边的科学现象，一起做实验吧！ 1.7.2013 Hello, boys and girls! Welcome back to our English class. Today, we are going to start a new unit, Unit 7. Look at the title, 'How do things change?' Can you guess what we will learn today? Let's find out! ‹#› Warm-up: Let's sing! Chant: Change, Change, Change! Change, change, change! Things can change! Solid to liquid, Liquid to gas! Change, change, change! Let's find out how! Let's learn English, Right now! Let's clap hands and sing together! Textbook Reference Page 1.7.2013 First, let's warm up with a chant! Listen carefully... Now, let's do it together! Clap your hands and say "Change, change, change!". Great job! You all have a good sense of rhythm. ‹#› Look and Say: Let's Make Ice Cream 教材场景：夏日的科学对话 Lead-in: Daily Conversation Child A:It's so hot today.Shall wemake some ice cream? Child B:Good idea!Let'smake some ice cream. Let's Talk! (Pair Work) ● What's the weather like in the story? ● What do the children want to make? ● How do they suggest making it? (Find "Shall we" & "Let's") Science Integration: Exploring Changes of Matter (Solid, Liquid, Gas) 1.7.2013 Look at the picture. It's a hot day. What are the children talking about? Let's listen to their conversation. (播放录音) Great! When we want to suggest doing something with our friends, we can use 'Shall we...?' or 'Let's...'. Today, we will learn how to use these sentences and explore how things change from liquid to solid when making ice cream! ‹#› 物质三态探索：Solid, Liquid, Gas Solid (固体) It has a shape. (它有固定的形状) Liquid (液体) It can flow. (它会流动) Gas (气体) We can't always see it. (我们不一定总能看见它) 1.7.2013 Look, this is ice. Ice is a solid. S-O-L-I-D, solid. A solid is something that has a shape. Now, look at the water. Water is a liquid. L-I-Q-U-I-D, liquid. A liquid can flow. When water gets very hot, it becomes steam. Steam is a gas. G-A-S, gas. We can't always see gas, but it's there. ‹#› 科学词汇小课堂：物质变化与食材 melt (融化) 固体受热变成液体的过程。 Tip: 冰淇淋在太阳下会融化哦！ sugar (糖) 白色的小颗粒，味道甜甜的。 Tip: 我们用它做甜点和饮料。 salt (盐) 细小的白色晶体，味道咸咸的。 Tip: 炒菜时加入它会更美味！ cream (奶油) 浓稠的乳白色液体，口感绵密。 Tip: 它是制作冰淇淋的重要原料。 1.7.2013 Look at the ice cream. What's happening to it? It's melting. M-E-L-T, melt. When a solid becomes a liquid, it melts. This is sugar, we use it to make things sweet. This is salt, we use it to make things salty. And this is cream, we use it to make ice cream. ‹#› Concept: Cause & Effect (因果关系) Cause (原因) The hot sun. (炎热的太阳) Effect (结果) The ice cream melts. (冰淇淋融化了) 💡 Science is all about finding cause and effect! 1.7.2013 We know ice cream melts. But why? What is the cause? The cause is the hot sun. And what is the effect? The effect is the ice cream becomes liquid. So, the hot sun causes the ice cream to melt. The melting is the effect. Can you think of another cause and effect? ‹#› Grammar Focus: Shall we...? & Let's... Textbook Reference Shall we + do...?(Polite / 更礼貌) • Shall we go to the park? • Answer: Yes, let's. / Good idea. Let's + do...(Direct / 更直接) • Let's go to the park. • Answer: OK. / Great! 1.7.2013 Both 'Shall we...?' and 'Let's...' are used to suggest doing something together. 'Shall we...?' is a little more polite. 'Let's...' is a direct suggestion. For example, 'Shall we read a story?' or 'Let's read a story.' ‹#› Practice: Let's Suggest! Shall we go swimming? "Great! Let's go swimming." Shall we have a picnic? "Good idea! Let's have a picnic." Class Task: Work with your partner and practice the dialogues! 1.7.2013 Now, let's practice. Look at the picture. I say, 'It's hot. Shall we go swimming?' You answer, 'Good idea! Let's go swimming.' Now work with your partner and practice the dialogues. ‹#› Practice 1: Listen and Number Task: Listen to the audio carefully and write down the correct order number for each picture. Tasting Ice Cream Yummy! Order: ____ Stirring Cream Mix it well! Order: ____ Adding Sugar Sweet & Salty Order: ____ In the Fridge Cool it down! Order: ____ 1.7.2013 We are going to listen to a short passage about making ice cream. Listen carefully and number the pictures in the correct order. Ready? Let's start. (播放录音) ... Okay, let's check the answers. ‹#› Practice 2: Read and Match Let's Answer the Questions! 1. What is the cause for the ice cream to melt? 2. What is the effect of the teachers' help? 3. What causes the mixture to freeze? Tip: Cause is why it happens, Effect is what happens! 1.7.2013 Now, let's read and match the cause with the correct effect. After you finish, let's answer some questions about the story. What is the cause for the ice cream to melt? ... Good! ‹#› Story Time: Let's make ice cream! (Part 1) Story Illustration Mrs Tan:Today is our school party. Let's get the ice cream. It's in the freezer. Lu Hang:Oh no! The freezer door is open. Look, I can't wait. Mrs Tan:Now there's no ice cream for the party. Mr Gao:Shall we make some more? Students:Sure! But how? Class Activity: Read the dialogue in pairs! 1.7.2013 Let's read a story about making ice cream! It is a school party, but the ice cream is gone! What will they do? Let's find out. (带领学生朗读故事) ‹#› Story Time: Let's make ice cream! (Part 2) 📚 Textbook Page ✨ Let's Read the Dialogue Mr Gao:Don't worry! I can teach you. Mr Gao:OK, kids. Get some big and small plastic bags. Then come to the classroom. Mr Gao:I have ice. I have cream, sugar and salt. Ma Tao:What shall we do? Mr Gao:Mix the sugar and cream. Then put the mixture in a small bag. 1.7.2013 Mr Gao is going to teach the students how to make ice cream! What do they need? Cream, sugar, salt, and ice! What's the first step? Let's read and find out. (带领学生朗读故事) ‹#› Story Time: Let's make ice cream! (Part 3) Illustration: Making Ice Cream Mr Gao:Look! I'm putting salt and ice in the big bag. I'm putting the small bag in it too. Now shake, shake, shake! Jia Li:Look! We have ice cream! Mr Gao:How's the ice cream, kids? Students:It's great! Can we have some more? Great job! 🍦 The ice cream is ready! 1.7.2013 What's the next step? They need to shake the bag! And look! The liquid cream becomes solid ice cream! It's magic! Let's read the last part of the story. ‹#› Extension: What is our world made of? Reading Corner Let's Discuss! (Group Talk) 1.What are the three states of matter? 2.What caused the cream to become solid ice cream? 3.What will happen to ice cream in the sun? Why? Q4: Things that melt! Look at the chocolate! Can you name other things that change from solid to liquid when heated? 1.7.2013 Let's learn more about our world. Everything is a solid, liquid, or gas. But things change! Let's discuss these questions. What caused the cream to become solid ice cream? ... And what other things can melt? Like chocolate! ‹#› Unit 7 Summary: How do things change? 核心词汇 Vocabulary States (状态):solid, liquid, gas Actions (动作):melt, cause, effect Objects (物品):sugar, salt, cream 重点句型 Sentences 1. Shall we...? (用于礼貌地提出建议) 2. Let's... (用于邀请一起做某事) 趣味故事 Story Title: Let's make ice cream! In this story, we learned how things change states when making ice cream. It's cool and yummy! Science is fun! Keep exploring! 科学真有趣，继续探索吧！ 1.7.2013 Today we learned a lot about how things change. We learned the three states of matter, some new words, and how to make suggestions. We also read a fun story about making ice cream. You all did a great job! ‹#› Homework: 科学英语课堂小任务 Level 1 (Must-do) 1. 单词抄写：solid, liquid, gas, melt, sugar, salt, cream (各5遍) 2. 故事背诵："Let's make ice cream!" Level 2 (Can-do) 1. 家庭对话：用 "Shall we...?" 和 "Let's..." 句型练习 2. 现象观察：尝试用简单英语描述一个你看到的变化过程 🌟 Keep going! You are doing great! 🌟 1.7.2013 Here is your homework. Please finish the must-do tasks. If you want a challenge, try the can-do tasks. I'm looking forward to seeing your amazing work! ‹#› Thank You! Keep exploring the world of changes! 感谢大家今天的努力，我们下次探索见！ See You Next Time 1.7.2013 That's all for today. Thank you for your hard work today. Keep exploring the world of changes! See you next time. Goodbye, everyone! ‹#› $