Unit Six Lesson 21 Snow Turns into Water（教学课件)英语北京版四年级上册（新教材）

after. Turn, turn. The water cycle. Hello, my name is to rizal. I am a tiny water drop. The sun is hating me up. I am getting smaller and smaller. Oh, I am going up, up, up into a cloud. We look at them. They look just like me. IT is really cool up here. I like this place. Hey, look at me. I am getting bigger and bigger. Oh, no, I am too big and heavy. I am falling from the sky. Where are am I now? Oh, I am in a river. My friends are falling onto the ground. They are sipping into the ground now this river is moving fast. Oh, no, a waterfall. What is this place? Oh, I am being cleaned. It's dark here. Where am I going now? Oh, flash. wow. Here I am again. It's so cold today. Yes, I can see your red nose. Look, there is eyes . on the window. Wow, so beautiful. Why is their eyes? The room is warm and the glass is cold. The water and the air gets cold on the glass. IT turns into ice. Look, it's snowing outside. I love snow. Me too. Let's go out and have fun after class. Oh, no, the sun comes out. Snow turns into water. That's your bed. nullHoly bird. Subscribe now and like. Water in the garden, water in the sea, water in the air. water is all around us. Water is a good for mature still. Be thankful for water. Let's save water together. Let's sea water to. gather. Water high in the sky, rain on the Green restaurant, water is what flowers drink and . fish breathe. What is a good for nor. So be thankful for water. To save water together. Lets save water together. Seat water . street light啦。啦啦啦啦啦。Give me a so be for the what's three water together, we are three water. yeah. nullnullnull BJ. 四年级上册 yyMfffffffr Unit Six Get Close to Nature PaPaLesson 20 Feel Nature on the Farmaltl Lesson 21 Snow Turns into Water 1 Learning Objectives 依托水的物态变化对话语篇开展学习，能读懂对话，认识冰、雪、水相关词汇；读懂对话逻辑，了解水、冰、雪之间的变化条件，知道温度会改变水的形态，明白窗户上冰花、雪融化的简单成因，感知水在大自然中的循环现象。 学习理解 内化描述水变化的交际用语；识别、读懂描述水形态变化的句型；依托训练任务，借助温度提示、图片复述水的变化过程；模仿对话框架进行角色扮演，用turns into口头说一说冰、雪、水之间的变化，熟练运用核心句型进行口语操练。 应用实践 创设生活真实场景：冰箱制冰、清晨叶片露珠等情境；借助思维导图支架梳理不同温度下水的形态；迁移本课水循环知识，自主观察生活里水的变化现象，尝试解释生活中的自然小现象，口头输出、表达自己的发现与思考。 迁移创新 【核心词汇】glass、turn、after、sun、bad 【核心句型】 1. 描述天气温度：It’s so cold today. 2. 表达看见某事物：I can see your red nose. 3. 用来介绍某处存在某物：There is ice on the window. 4. 针对现象提问、探寻原因：Why is there ice? 5. 描述变化：It turns into ice./Snow turns into water. 6. 描述正在发生的天气现象：Look, it’s snowing outside. 7. 交际用语：That’s too bad!/Don’t worry. 核心知识点 BJ. 四年级上册 素养提升：学会观察生活里水的形态变化，能用英语简单描述自然现象；理解水是大自然重要的一部分，水循环时刻发生在身边；乐于观察、乐于探索自然科学，树立珍惜水资源、爱护自然的意识。 1 Lead in 2 Presentation 3 Practice 4 Summary 5 Homework Contents 3 Part 1 Lead in 4 Lead in Watch the video and try to read after it. 5 Lead in Read and try to know something new. The Water Cycle Hello! My name is Drizzle. I am a tiny water drop. Whew! The sun is heating me up! I am getting smaller and smaller. Oh! I am going up, up, up into a cloud! Whee! Look at them. They look just like me. It is really cool up here. I like this place. Hey! Look at me! I am getting bigger and bigger. Oh no! I am too big and heavy! I am falling from the sky! Where am I now? Oh I am in a river. My friends are falling onto the ground. They are seeping into the ground. Now this river is moving fast! Oh no! A waterfall! What is this place? Oh! I am being cleaned! It’s dark in here. Where am I going now? Ohh! “Splash!” Wow! Here I am again! 6 Lead in Read and try to match. 1. a tiny water drop　　　　　 A. 落到地上 2. heat … up　　　　　　　　 B. 一滴小小的水滴 3. get smaller and smaller　 C. 加热，使……升温 4. fall onto the ground　　　 D. 变得越来越大 5. get bigger and bigger　　 E. 变得越来越小 7 Lead in Read and try to choose. 1. Drizzle is a ______. A. cloud　 B. water drop　 C. sun 2. ______ heats Drizzle up. A. The cloud　 B. The sun　 C. The river 3. Drizzle goes up into a ______. A. cloud　 B. waterfall　 C. ground 4. Drizzle falls from the sky into a ______. A. river　 B. cloud　 C. sun 5. Drizzle’s friends seep ______ the ground. A. up　 B. into　 C. out 8 Lead in Read and try to judge T or F. ( ) 1. Drizzle is a little water drop. ( ) 2. The sun makes Drizzle bigger. ( ) 3. It is cool high up in the cloud. ( ) 4. Drizzle falls from the sky and is in a river. ( ) 5. The river moves slowly. T F T T F smaller fast 9 Part 2 Presentation 10 Watch the video and try to finish exercises. Presentation 11 Lead in Read and try to match. 1. It’s so cold today.　　　　　　 A. 雪变成了水。 2. There is ice on the window.　　 B. 今天好冷。 3. turn into ice　　　　　　　　 C. 太阳出来了。 4. The sun comes out.　　　　　 D. 窗户上有冰。 5. Snow turns into water.　　　　 E. 变成冰 12 Lead in Read and try to choose. 1. There is ______ on the window. A. snow　 B. ice　 C. water 2. —Why is there ice? —Because the ______ in the air gets cold. A. water　 B. sun　 C. nose 3. Snow ______ water when the sun comes out. A. turn into　 B. turns into　 C. turning into 4. —I love snow. —______. A. That’s too bad　 B. Me, too　 C. OK 5. Let’s ______ and have fun after class. A. go out　 B. go home　 C. go to bed 13 Look and learn new words. Presentation glass 玻璃 a glass of milk 一杯牛奶 on the glass 在玻璃上 This is a glass of milk. 这是一杯牛奶。 There is ice on the glass. 玻璃上面有冰。 turn 转向，改变 turn into 变成 turn right 向右转 Please turn right at the door. 请在门口右转。 Water turns into ice when it is cold. 天冷的时候水变成冰。 14 Look and learn new words. Presentation after在……之后 after class 下课后 after dinner 晚饭后 I walk after dinner. 我晚饭后散步。 Let’s play after class. 我们下课后一起玩。 sun 太阳 in the sun 在阳光下 the sun comes out 太阳出来 The cat sleeps in the sun. 小猫在阳光下睡觉。 The sun comes out. Snow turns into water. 太阳出来，雪变成水。 15 Look and learn new words. Presentation bad 糟糕的 bad weather 坏天气 that’s too bad 那太糟糕了 We don’t like bad weather. 我们不喜欢坏天气。 —We can’t play with snow.我们不能玩雪了。 —That’s too bad! 那太糟糕了！ 16 Presentation Listen and learn new words by heart. glass 玻璃 turn 转向，改变 after 在……之后 sun 太阳 bad 糟糕的 17 Play a game. Presentation Missing game glass after sun 在……之后 bad 糟糕的 turn 改变；转向 太阳 玻璃 18 Presentation Watch the video again and learn more. 19 Presentation Read again and learn something new. It’s so cold today.今天好冷。 Yes. I can see your red nose. Haha!是的，我都看见你的红鼻子啦。哈哈！ Look! There is ice on the window. Why? 看！窗户上有冰。为什么？ The room is warm, and the glass is cold. The water in the air gets cold on the glass. It turns into ice.房间里暖暖的，玻璃却是凉的。空气中的水汽在玻璃上遇冷，就变成了冰。 20 Read again and learn something new. Presentation It’s so cold today.今天好冷。 本句是谈论天气的基础句型，用来直接描述当下天气状况。 1. It在这里是虚主语，用来指代天气，是英语中描述天气的固定用法。 2. so是副词，意为“如此，这么”，用来加强语气，修饰后面的形容词。 3. cold是形容词，意为“寒冷的”。 4. today是时间状语，意为“今天”。 例句：It’s so warm today. 今天好暖和。 It’s so hot today. 今天好热。 It’s so cool today. 今天好凉爽。 【考点提醒】1. 描述天气用It作主语。 2. so后面加形容词，例如：so cold/so beautiful。 21 Presentation Read again and learn something new. It’s so cold today.今天好冷。 Yes. I can see your red nose. Haha!是的，我都看见你的红鼻子啦。哈哈！ Look! There is ice on the window. Why? 看！窗户上有冰。为什么？ The room is warm, and the glass is cold. The water in the air gets cold on the glass. It turns into ice.房间里暖暖的，玻璃却是凉的。空气中的水汽在玻璃上遇冷，就变成了冰。 22 Read again and learn something new. Presentation I can see your red nose. 我都看见你的红鼻子啦。 “I can see …”是感官句型，表示“我能看见……”，用来说出自己看到的东西，属于观察的表达。 1. can是情态动词，表示“能够，可以”，后面必须跟动词原形，没有人称变化。 2. see是动词原形，意为“看见”。 3. your是形容词性的物主代词，意为“你的”。 4. red nose意为“红鼻子”。red是形容词，意为“红色的”，修饰nose。 例句：I can see ice on the window. 我能看见窗户上的冰。 I can see snow outside. 我能看见外面的雪。 23 Presentation Read again and learn something new. It’s so cold today.今天好冷。 Yes. I can see your red nose. Haha!是的，我都看见你的红鼻子啦。哈哈！ Look! There is ice on the window. Why? 看！窗户上有冰。为什么？ The room is warm, and the glass is cold. The water in the air gets cold on the glass. It turns into ice.房间里暖暖的，玻璃却是凉的。空气中的水汽在玻璃上遇冷，就变成了冰。 24 Read again and learn something new. Presentation There is ice on the window. 窗户上有冰。 该句是there be句型，描述“某处有某物”，重点在客观存在。此处的结构为“There is + 不可数名词 + 地点状语.”，表示“某处有某物”。There be 句型： 1. There is表示“有”，用来表达某地存在某物。 【区分】There is…后面接可数名词单数或不可数名词；There are…后面接可数名词的复数。 2. ice是不可数名词，意为“冰”，所以be动词用is。 3. on the window是地点状语，意为“在窗户上”。 例句：There is ice on the glass. 玻璃上面有冰。There is a cloud in the sky. 天上有一朵云。 There is snow on the ground. 地上有雪。There is water in the cup. 杯子里有水。 【考点提醒】不要和have混淆：There is表“某地有”；have表 “某人拥有”。 25 Presentation Read again and learn something new. It’s so cold today.今天好冷。 Yes. I can see your red nose. Haha!是的，我都看见你的红鼻子啦。哈哈！ Look! There is ice on the window. Why? 看！窗户上有冰。为什么？ The room is warm, and the glass is cold. The water in the air gets cold on the glass. It turns into ice.房间里暖暖的，玻璃却是凉的。空气中的水汽在玻璃上遇冷，就变成了冰。 26 Read again and learn something new. Presentation The water in the air gets cold on the glass. 空气中的水汽在玻璃上遇冷。 该句的重点结构为“get + 形容词”，表示“（事物）变得……”，描述状态发生变化，用来讲解物态变化。 1. 主语The water在本课指“水汽”。 2. in the air是介词短语，作后置定语，修饰主语The water。 3. gets cold意为“变冷”。其中gets是系动词，在这里表示“变得”，后面接形容词； cold是形容词，意为“冷的”。 4. on the glass是地点状语，意为“在玻璃上”。 例句：The water gets hot. 水变热了。 The water gets cold in winter. 水在冬天会变冷。 get在此处意为“变得”；“get + 形容词”侧重状态变化。 27 Presentation Read again and learn something new. It’s so cold today.今天好冷。 Yes. I can see your red nose. Haha!是的，我都看见你的红鼻子啦。哈哈！ Look! There is ice on the window. Why? 看！窗户上有冰。为什么？ The room is warm, and the glass is cold. The water in the air gets cold on the glass. It turns into ice.房间里暖暖的，玻璃却是凉的。空气中的水汽在玻璃上遇冷，就变成了冰。 28 Read again and learn something new. Presentation It turns into ice.它就变成了冰。 turn into是本课的核心短语，用来表达“物质形态发生转变”，适合描述水、冰、雪的物态变化。 1. 主语It在这里指代前面的“the water in the air”。 2. 动词短语turns into意为“变成”；主语it是第三人称单数，turn要加-s。 3. ice是宾语，是不可数名词，意为“冰”。 例句：Snow turns into water. 雪变成水。Water turns into ice. 水变成冰。 Ice turns into water. 冰变成水。The cloud turns into rain.云变成雨。 When it is cold, water turns into ice. 天冷的时候，水变成冰。 当主语是it、snow、water这类单数或不可数名词时，用turns into；主语为复数时用turn into。 29 Presentation Read again and learn something new. Look, it’s snowing outside. I love snow.看，外面正在下雪。我喜欢雪。 Me, too. Let’s go out and have fun after class.我也是。下课后我们出去玩吧。 Oh, no! The sun comes out. Snow turns into water.哦，不好！太阳出来了。雪变成了水。 That’s too bad!那太可惜啦！ 30 Read again and learn something new. Presentation Look, it’s snowing outside.看，外面正在下雪。 该句的句型结构为“Look, it is + 现在分词 + 地点状语.”，用来描述此刻正在发生的天气。 1. Look此时是感叹词，意为“看”，用来吸引对方的注意。 2. 描述天气依然用it作主语，不用weather。 3. snowing是snow的现在分词。 4. outside是副词，意为“在外面”，前面不加介词，不说in outside。 例句：It’s raining outside. 外面正在下雨。 It’s blowing outside. 外面正在刮风。 It’s snowing outside. It’s very cold.外面正在下雪，天很冷。 Look! It’s snowing. We can play with snow. 看！正在下雪，我们可以玩雪。 31 Presentation Read again and learn something new. Look, it’s snowing outside. I love snow.看，外面正在下雪。我喜欢雪。 Me, too. Let’s go out and have fun after class.我也是。下课后我们出去玩吧。 Oh, no! The sun comes out. Snow turns into water.哦，不好！太阳出来了。雪变成了水。 That’s too bad!那太可惜啦！ 32 Read again and learn something new. Presentation Let’s go out and have fun after class.下课后我们出去玩吧。 该句的句型结构为“Let’s + 动词原形 +（and + 动词原形）+ 时间状语.”，是提建议的句型，用来邀请别人一同做某事。 1. Let’s = Let us，意为“让我们……”，用来提建议、邀约一起做事情。 2. go out是动词短语，意为“出去”。 3. and是连词，连接两个并列动作go out和have fun。 3. have fun是固定搭配，意为“玩得开心；玩耍”。 4. after class是时间状语，意为“下课后”。 例句：Let’s read books after class. 我们下课后看书吧。 Let’s watch the ice on the window. 我们去看看窗上的冰吧。 33 Presentation Read again and learn something new. Look, it’s snowing outside. I love snow.看，外面正在下雪。我喜欢雪。 Me, too. Let’s go out and have fun after class.我也是。下课后我们出去玩吧。 Oh, no! The sun comes out. Snow turns into water.哦，不好！太阳出来了。雪变成了水。 That’s too bad!那太可惜啦！ 34 Read again and learn something new. Presentation The sun comes out. 太阳出来了。 该句描述自然现象，表示“太阳出现”。天晴是雪融化的条件。 1. 主语The sun意为“太阳”，sun是世界上独一无二的事物，前面一定要加定冠词the。 2. comes out是固定短语，表示“（太阳、月亮）出来；露出”。因为主语the sun是单数，动词come要用第三人称单数形式comes。 例句：The sun comes out in the morning.太阳在早上出来。 The sun comes out. The ice gets warm.太阳出来了，冰变暖和了。 【区分】come out的多义： ①（日月）出来：The sun comes out.太阳出来了。 ②（人）外出：Come out to play!出来玩耍吧！ 35 Presentation Read again and learn something new. Look, it’s snowing outside. I love snow.看，外面正在下雪。我喜欢雪。 Me, too. Let’s go out and have fun after class.我也是。下课后我们出去玩吧。 Oh, no! The sun comes out. Snow turns into water.哦，不好！太阳出来了。雪变成了水。 That’s too bad!那太可惜啦！ 36 Read again and learn something new. Presentation That’s too bad!那太可惜啦！ 这是口语感叹句，听到不好、让人失望的消息时用来表达遗憾、惋惜。 1. 代词that指代前面这件不好的事情（本课指雪融化了，不能玩雪这件事）。 2. too是副词，意为“太；过于”，用来加强语气，修饰后面的形容词bad。 3. bad是形容词，意为“糟糕的”。 例句：—I can’t play with snow. 我不能玩雪了。—That’s too bad! 那太可惜了！ —It is raining. We can’t go out. 下雨了，我们不能出去。 —That’s too bad! 那太糟糕了！ 副词too常用来修饰形容词： too bad太糟糕；too cold太冷；too big太大。 37 Listen again and repeat. Presentation It’s today. Yes. I can your . Haha! Look! the window. The room is , and the is . The water in the 。 cold on the glass. It ice. Look, it’s . I love snow. Me, too. Let’s and . Oh, no! The . turns into . That’s ! so cold see red nose There is ice warm glass cold air gets turns into snowing outside go out have fun after class sun comes out Snow water too bad 38 Lead in Read and try to fill. 根据课文内容，补全句子。 1. It’s so ______ today. 2. There ______ ice on the window. 3. The water in the air gets cold. It ______________ ice. 4. The sun ______ out. Snow turns into water. 5. —I love snow. —______, too. cold is turns into comes Me 39 Lead in Read and try to judge T or F. ( ) 1. It is hot today. ( )2. The water in the air turns into ice on the cold glass. ( )3. The children love snow. ( )4. The sun comes out, and snow turns into ice. ( )5. They want to go out to play after class. cold F T T water F T 40 Lead in Read and try to answer. 1. Why is there ice on the window? . . . 2. What happens when the sun comes out? . The room is warm, and the glass is cold. The water in the air gets cold on the glass. It turns into ice. Snow turns into water. 41 Listen and find Presentation on the way to school 在上学路上 in the classroom在教室里 on the playground 在操场上 It’s so _________ today. Guoguo has a red nose.今天好冷。果果鼻子冻红了。 The water in the air gets cold on the glass. It _________________. 空气中的水汽在玻璃上遇冷，变成冰。 The sun comes out. Snow 。 _________.太阳出来了，雪变成水。 cold turns into ice turns into water 42 Presentation Listen, choose and retell A B C 43 Presentation Listen, choose and retell hot fly cool turn into water cold turn into snow and ice 翻译： 嗨，我是水先生。啊，现在很热，我飞到空中。哦，现在变冷了，我又变成雨。哇，太冷啦，我变成雪。 44 Presentation Think and say Oh, it’s too hot today. My ice is turning into … .哦，今天太热了。我的冰正在变成…… Don’t worry. Let’s put the ice in here.别担心。我们把冰放到这里（冰箱）。 It gets … here. Water … again. 45 Presentation Think and say Oh, it’s too hot today. My ice is turning into … . Don’t worry. Let’s put the ice in here.别担心。我们把冰放到这里（冰箱）。 It gets … here. Water … again. Oh, it’s too hot today. My ice is turning into water.哦，今天太热了。我的冰正在变成水。 It gets cold here. Water turns into ice again.这里会变冷。水又变成冰。 46 Presentation Think and say There is some water on the leaves in the early morning. Do you know why?清晨叶子上有一些水珠，你知道为什么吗？ Let me see. ... Let me see. Because it gets cold at night. The water in the air turns into small water drops on the leaves.让我想想。因为夜里气温变低，空气中的水汽在叶子上变成小水珠。 47 Part 3 Practice 48 选出每组中不同类的一项。 （ ）1. A. sunny B. snowy C. nature （ ）2. A. feed B. fruit C. collect （ ）3. A. cold B. water C. ice （ ）4. A. sun B. air C. green Read and choose. Practice C B A C 49 根据图片提示，选择合适的内容，解释窗上冰花的形成原因。 1. 2. 3. 4. ( ) ( ) ( ) ( ) A. The glass is cold. B. The room is warm. C. It’s cold today, It’s snowing outside. D. The water in the air gets cold on the glass. It turns into ice. Read and choose. Practice C A B D → + 50 Read and judge T or F. Practice Water is very important. It has three forms. When it is hot, water turns into vapour（水汽）. It goes up into the air. When it is very cold, water turns into ice. We can see ice on the window in winter. Snow is also a form of water. When the sun comes out, snow turns into water again. We can see water, ice and snow around us. They are all water. 阅读短文，判断句子正 (T) 误 (F)。 ( ) 1. Water has three forms. ( ) 2. When it is hot, water turns into ice. ( ) 3. Ice can be on the window on cold days. ( ) 4. Snow is not water. ( ) 5. The sun can make snow turn into water. T F T F T 51 Part 4 Summary 52 Summary 【核心词汇】glass、turn、after、sun、bad 【核心句型】 1. 描述天气温度：It’s so cold today. 2. 表达看见某事物：I can see your red nose. 3. 用来介绍某处存在某物：There is ice on the window. 4. 针对现象提问、探寻原因：Why is there ice? 5. 描述变化：It turns into ice./Snow turns into water. 6. 描述正在发生的天气现象：Look, it’s snowing outside. 7. 交际用语：That’s too bad!/Don’t worry. Lesson 21 Snow Turns into Water 53 Part 5 Homework 54 Homework 基础：熟练跟读课文对话，朗读新单词，尝试默写核心词汇与重点句型。 提高：1. 2人一组，模仿课文对话，分角色扮演，说一说冰、雪、水的变化条件。 2. 用句型“… turns into …”进行练习，说说水在不同温度下会变成什么。 拓展：1. 和家人观察生活中水的变化现象，创编水形态变化主题的英语小对话。 2. 观看新的视频，然后画一画水的变化过程，用英语句型“When it is cold, water turns into ______. When the sun comes out, ______ turns into water.”来介绍你的作品，下节课分享。 55 BJ. 四年级上册 Thank you! Thank you! 56 null 1306.1221 null 1133.1426 null 1162.5575 null 1209.6323 null 1253.8772 $Bad, bad. Glass, glass. sand. Loose . trend. This is water. the water drop. He likes traps. Join him. Busters home is the lake. I'm ready for the trip. He goes up. He likes . the sun. I'm hot. I'm light. IT is warm. Water goes up, up, up. 呜呼。He meets friends. Hi, hello, good morning. It's cold . up here. The . friends are now a cloud. Now they are water . drops again, a lot of water drops. They are very heavy. They fall down. This is voters . favorite moment. Yeah. i'm a rain draw. Oh, no. 啊。Ouch, i'm back. I'm a water drop . again. Back to the . lake now, he goes down, down, down. The lake and back. I love this . trip again, again, again. 乐多多，抖。音。