导体和绝缘体
Conductors and insulators
认识一些常见的导体和绝缘体，并知道金属通常是良好的电导体。
Recognise some common conductors and insulators, and associate metals with being good conductors of electricity
学习证据 / Evidence
- 定义导体（让电流通过）和绝缘体（阻止电流通过）
- 测试至少六种材料，并正确将它们分类为导体或绝缘体
- 说明金属通常是良导体，并解释为什么电线用金属制成，外面包着塑料
- Define conductors (allow electricity to flow through) and insulators (block electricity)
- Test at least six materials and correctly classify them as conductors or insulators
- State that metals are generally good conductors and explain why wires are made of metal with plastic coating
评估问题 / Assessment
{{name}}能否在电路中测试物体，并解释为什么金属物体能导电，而橡胶和塑料不能？
Can {{name}} test objects in a circuit and explain why metal objects let electricity through but rubber and plastic don't?