Unit Six Lesson 21 Snow Turns into Water（分层作业）英语北京版四年级上册（新教材）

**基本信息** Unit Six Lesson 21分层同步练习，通过基础、提升、拓展三层设计，实现从词汇句型到语篇应用的知识巩固，适配新授课差异化教学需求，培养语言能力与思维品质。 **分层设计** |层次|知识覆盖|设计特色| |----|----------|----------| |基础练|核心词汇（ice, snow等）与简单句型匹配|图片选择+词汇填空，强化情境认知与基础表达| |提升练|语法（there be句型、连词）与对话应用|单选巩固语言结构，补全对话提升交际能力| |拓展练|科普语篇理解与信息提取|阅读判断短文，培养信息分析与逻辑思维品质|

Unit Six Get Close to Nature Lesson 21 Snow Turns into Water（分层作业） PART 01 基 础 练 一、给下列句子或对话选择合适的图片。 A. B. C. D. E. ( ) 1. —I love snow. —Me too. Let’s go out to play. ( ) 2. It’s so cold today. Water turns into ice. ( ) 3. The snow turns into water because the sun comes out. ( ) 4. —He has a high fever. —Please put an ice bag on his head. ( ) 5. There is some water on the leaves in the morning. 二、天气变化真奇妙！请根据句子填写与冬天或冰雪相关的词汇。 A. turns into            B. cold            C. ice            D. It’s snowing            E. changes into ( ) 1. It’s so cold today. I can see on the window. ( ) 2. The water in the air gets cold on the glass and ice. ( ) 3. outside! Let’s play after class. ( ) 4. When the sun comes out, snow water. ( ) 5. Why is there ice? Because the room is warm, and the glass is . PART 02 提 升 练 三、单项选择。 ( ) 1. ______ ice on the window in winter. A. There is B. There are C. Have ( ) 2. The room is warm, ______ the glass is cold. A. and B. but C. or ( ) 3. The sun comes out. Snow ______ water. A. turns into B. gets cold C. looks at ( ) 4. After the rain, the sun ______. A. comes out B. goes out C. turns into 四、Jack 来农场找 Yangyang。选择合适的句子补全对话，将序号填在横线上。 A. When it’s very cold, the water in clouds freezes into snow! B. Do you like snow? C. The water in the air gets cold on the glass. D. Let’s go and play in the snow now! E. Where do they come from? Yangyang: Hello, Jack! Your nose is so red! Jack: Yes! It's very cold today. It’s snowy outside. 1. ________ Yangyang: Yes. But why does it snow? Jack: 2. ________ Yangyang: Sounds magic. Look! The window has ice flowers! Jack: Wow! They’re so pretty! Yangyang: 3. ________ Jack: The room is warm, and the glass is cold. 4. ________ Yangyang: That’s amazing! 5. ________ Jack: OK! But wear gloves—it’s freezing! PART 03 拓 展 练 五、【新语篇·科普文章】阅读短文，判断下列句子正 (T) 误 (F)。 Water is all around us. It has three states (状态). When water is very cold (below 0℃), it is ice—a solid (固体). When water is warm, it is a liquid (液体). When water is very hot (above 100℃), it becomes steam—a gas (气体) we cannot see. Water is very useful. We use it every day. We wash our hands and vegetables with it. We wash our clothes, too. Farmers use water to grow crops. Firefighters use water to put out fires. We also drink water to stay healthy. Water is very important. We must save water every day! ( ) 1. Water has two states. ( ) 2. Steam is a gas and we can’t see it. ( ) 3. Farmers use water to put out fires. ( ) 4. We must save water every day because water is important. 参考答案及解析 一、给下列句子或对话选择合适的图片。 1. C 2. B 3. D 4. E 5. A 【解析】1. 句意：—我喜欢雪。—我也是，让我们出去玩吧。图片 C 为孩子们玩雪，和句子场景对应。故答案为 C。 2. 句意：今天天气很冷，水结成冰。图片 B 是结了冰花的窗户，和句子场景对应。故答案为 3. B。 句意：因为太阳出来了，雪融化成水。图片 D 是太阳照射下正在融化的雪人，和句子场景对应。故答案为 D。 4. 句意：—他发高烧。—请在他头上放一个冰袋。图片 E 是生病卧床的男孩，和句子场景对应。故答案为 E。 5. 句意：早上树叶上有一些水。图片 A 是带有水珠的树叶，和句子场景对应。故答案为 A。 二、天气变化真奇妙！请根据句子填写与冬天或冰雪相关的词汇。 1. C 2. E 3. D 4. A 5. B 【解析】1. 句意：今天很冷。我看见窗户上有冰。ice冰，符合句意，故选C。 2. 句意：空气中的水蒸气在玻璃上遇冷凝结成冰。changes into变成，强调改变的动作或过程，故选E。 3. 句意：外面下雪了！我们下课后一起玩吧。It’s snowing下雪了，符合句意，故选D。 4. 句意：当太阳升起时，雪会变成水。turns into变成，更侧重于描述一种自然的、渐进的或不可避免的转变过程，故选A。 5. 句意：为什么会有冰？因为房间很暖和，而玻璃很冷。cold冷的，符合句意，故选B。 三、单项选择。 1. A 2. B 3. A 4. A 1. A 【解析】句意：冬天窗户上有冰。本题考查there be句型，ice是不可数名词，be用is，故选A。 2. B 【解析】句意：房间很暖和，但玻璃很冷。本题考查转折关系的连词。and和，but但是，or或，横线前后是转折关系，用转折连词but连接，故选B。 3. A 【解析】句意：太阳出来了。雪变成了水。本题考查动词短语。turns into变成，gets cold变冷，looks at看，选项A符合句意，故选A。 4. A 【解析】句意：雨后，太阳出来了。本题考查动词短语。comes out出来，goes out出去，turns into变成，选项A符合句意，故选A。 四、Jack 来农场找 Yangyang。选择合适的句子补全对话，将序号填在横线上。 1. B 2. A 3. E 4. C 5. D 【导语】下雪天 Jack 来到农场找 Yangyang，二人围绕下雪、窗户冰花展开有趣对话。 【解析】1. 下文答语 “Yes.” 是对一般疑问句的回应，B 选项为一般疑问句，符合问答逻辑。故答案为 B。 2. 上文提问为什么会下雪，A 选项讲解雪的形成原理，回应问题。故答案为 A。 3. 下文在介绍冰花的形成条件，本处应是对冰花来源提出疑问，E 选项符合上下文。故答案为 E。 4. 承接前一句，继续说明冰花的形成过程，C 选项逻辑衔接通顺。故答案为 C。 5. 下文 “OK!” 是对提议的赞同，D 选项提出出去玩雪的建议，匹配答句。故答案为 D。 五、【新语篇·科普文章】阅读短文，判断下列句子正 (T) 误 (F)。 1. F 2. T 3. F 4. T 【解析】1. 句意：水有两种状态。根据文中 “It has three states (状态).”，水有三种状态。故答案为 F。 2. 句意：水蒸气是一种气体，我们看不见它。根据文中 “it becomes steam—a gas (气体) we cannot see.”，和原文表述一致。故答案为 T。 3. 句意：农民用水灭火。根据文中 “Farmers use water to grow crops. Firefighters use water to put out fires.”，农民用水种庄稼，消防员用水灭火。故答案为 F。 4. 句意：我们必须每天节约用水，因为水很重要。根据文中 “Water is very important. We must save water every day!”，和原文表述一致。故答案为 T。 2 / 2 学科网（北京）股份有限公司 学科网（北京）股份有限公司 $