🎮 Games › 🎬 Lesson videos › Picture Book: The Singing Rubber BandPicture Book: The Singing Rubber Band
⏱ 0:50 📘 Grade 4 Science · Term 1 · Lessons 13–17
Dr Cat shows Bunny that sound comes from vibration, travels through air, water and solids (but not a vacuum), is louder with bigger vibrations and higher with faster ones. Bunny makes a straw panpipe!
The videos are narrated in Mandarin Chinese with on-screen subtitles.
📚 What you will learn
Sound is made by vibration : beans jump on a beaten drum. Sound travels through gases, liquids and solids in all directions; not through a vacuum. Bigger vibrations → louder ; faster vibrations → higher pitch (tighter, shorter, thinner). Short straws play high notes, long ones low. Music vs noise — protect your hearing.
🎙️ What the video says (in Chinese)
绘本故事《会唱歌的橡皮筋》。小兔：猫博士，声音是从哪里来的？ 猫博士：在鼓面上放些豆子，敲一敲！小兔：哇，豆子都跳起来了！猫博士：鼓面在振动。声音，是物体振动产生的。 小兔：那声音是怎么跑进耳朵里的？猫博士：声音能在空气、水和固体里，向各个方向传播。把罩子里的空气抽走，就听不见铃声了。 猫博士：用力弹橡皮筋，振动的幅度大，声音就响；轻轻弹，声音就轻。 猫博士：把橡皮筋拉紧、变短、换成细的，振动变快，声音就变高。小兔：我用长短不同的吸管做了排箫！短的高，长的低！ 声音有强弱，也有高低。好听的是乐音，吵闹的是噪声，要保护好耳朵。
✏️ Try it yourself
How is sound produced?
Show answer By vibration
Which straw in a panpipe plays the highest note?
Show answer The shortest one
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← All lesson videos
