选择合适的材料
Choosing the Right Material
识别并比较日常材料是否适合某种用途，解释为什么某些用途要选用特定的材料
Identify and compare the suitability of everyday materials for particular uses, explaining why specific materials are chosen for specific purposes
学习证据 / Evidence
- 能根据材料的特性解释为什么某个用途会选择某种材料（例如窗户用玻璃，因为玻璃是透明的）
- 能比较两种材料，并说明理由判断哪一种更适合给定的用途
- 能为某个物品提出一种替代材料，并解释为什么可行或不可行
- Explain why a specific material is chosen for a purpose based on its properties (e.g. glass for windows because it's transparent)
- Compare two materials and decide which is more suitable for a given use with reasoning
- Suggest an alternative material for an object and explain why it would or wouldn't work
评估问题 / Assessment
{{name}}能解释为什么窗户用玻璃而不用木头，或者雨靴用橡胶而不用纸吗？
Can {{name}} explain why windows are made of glass and not wood, or why wellies are made of rubber and not paper?