影子的形成
How Shadows Form
认识影子是在光源发出的光被不透明物体挡住时形成的，并发现影子大小的变化规律。
Recognise that shadows are formed when light from a source is blocked by an opaque object, and find patterns in how shadow size changes
学习证据 / Evidence
- 解释影子形成是因为不透明物体挡住了光线，使光线无法照到某个表面
- 描述规律：物体离光源越近，影子就越大
- 根据光源和物体的位置，预测影子的形状和相对大小
- Explain that a shadow forms because an opaque object blocks light from reaching a surface
- Describe the pattern: shadow gets larger when object moves closer to the light source
- Predict the shape and relative size of a shadow given the position of light and object
评估问题 / Assessment
{{name}}能制作影子手偶，并解释为什么把手偶移近手电筒时影子会变大吗？
Can {{name}} make shadow puppets and explain why the shadow gets bigger when you move the puppet closer to the torch?