重力与下落的物体
Gravity & Falling Objects
说明不受支撑的物体会落向地球，是因为地球与物体之间存在着重力。
Explain that unsupported objects fall towards the Earth because of the force of gravity acting between the Earth and the falling object
学习证据 / Evidence
- 将重力定义为地球与物体之间的一种吸引力
- 解释不受支撑的物体之所以下落，是因为重力将它们拉向地球
- 举出重力起作用的例子，如扔下物体、跳跃、水往低处流
- Define gravity as a force of attraction between the Earth and objects
- Explain that unsupported objects fall because gravity pulls them towards the Earth
- Give examples showing gravity in action (dropping objects, jumping, water flowing downhill)
评估问题 / Assessment
{{name}}能解释为什么松开手后所有东西都会往下掉，并说出造成这种现象的力是什么吗？
Can {{name}} explain why everything falls downwards when you let go of it, and name the force that causes this?