振动与声音

理解振动物体会发出声音，声音也能让物体振动。

Understand that vibrating materials can make sound, and that sound can make materials vibrate

学习证据 / Evidence

• 能描述声音是由物体振动（快速来回移动）产生的
• 能举出至少三个振动物体发出声音的例子（鼓面、吉他弦、声带）
• 能演示声音会让物体振动（例如，对着鼓大声喊叫，鼓上的米粒会跳动）

• Describe that sounds are made when objects vibrate (move back and forth quickly)
• Give at least three examples of vibrating objects making sound (drum skin, guitar string, voice box)
• Demonstrate that sound can cause objects to vibrate (e.g. rice on a drum jumps when you shout near it)

评估问题 / Assessment

{{name}}能不能拨动橡皮筋，并解释是橡皮筋的振动发出了声音，再把尺子放在音箱上，观察它随着音乐抖动？

Can {{name}} pluck a rubber band and explain that the vibrating band makes the sound, and then hold a ruler on a speaker and see it shake from the music?