* What you need?
- 5-6 glass beakers
- Water
- Wooden pencil
* What you do?
- Line the beakers
- Pour different amount of water lowest to highest
- Use a pencil and tap to hear the noise
* What happened?
- It makes different sounds
- Least water made highest sound
* Why?
- The sound waves travel through liquid
- By changing the amount of the water, the sound waves changes
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