🧪 Vibration Detective
Objective: See and feel the vibrations that make sound.
🔮 Step 1 — Predict first!
Your prediction
Predict: what will happen to the rice when you tap the drum harder?
🧰 Materials
📋 Instructions
2. Put rice grains on the drum and tap it gently. Watch the rice dance!
3. Hum with your fingers on your throat. Feel the vibration.
⚙️ The variables
🔧 What we change
How strongly you tap or pluck
📏 What we measure
How much the objects vibrate
⚖️ What stays the same
The same container and rubber band
📊 Step 2 — Collect your data
Enter your own measurements below — the chart draws itself as you type. If your experiment does not have measurements, record what you saw in the notes box.
| Day / Try | Measurement A | Measurement B | Notes |
|---|---|---|---|
| 1 | |||
| 2 | |||
| 3 | |||
| 4 | |||
| 5 | |||
| 6 |
📈 Your bar chart will appear here.
🔍 Step 3 — Prediction vs observation
💡 The science behind it
Every sound starts with a vibration. The tapping makes the drum skin vibrate, and the vibration shakes the rice. Bigger vibrations make louder sounds.
🏁 Conclusion
You saw sound with your own eyes — the dancing rice was moved by invisible vibrations!
🚀 Extension challenge
Can you make a sound without anything vibrating? Try to find one — scientists say it cannot be done!
🧑🏫 Teacher notes
Use an unbreakable container; rice is a choking hazard for under-3s.