固体形状的变化
Changing Shapes of Solids
探究如何通过挤压、弯曲、扭转和拉伸来改变固体物体的形状。
Investigate how the shapes of solid objects can be changed by squashing, bending, twisting, and stretching
学习证据 / Evidence
- 演示改变固体形状的四种方法：挤压、弯曲、扭转和拉伸。
- 比较不同材料对这些力的反应（例如，黏土容易挤压变形，木头则不然）。
- 解释即使形状改变，材料本身仍然保持不变。
- Demonstrate four ways to change the shape of a solid: squashing, bending, twisting, stretching
- Compare how different materials respond to these forces (e.g. clay squashes easily, wood does not)
- Explain that the material itself stays the same even when the shape changes
评估问题 / Assessment
{{name}}能向大家演示怎样通过挤压来改变黏土的形状、扭一扭扭扭棒，并说明有些材料会弯曲、有些会折断吗？
Can {{name}} show you how to change the shape of clay by squashing it, twist a pipe cleaner, and explain that some materials bend while others snap?