Thursday, October 22, 2009

Brainiacs

WALT find information
We found information on sound

1. Beating a drum hard causes louder vibration and louder sound
2. Sounds are louder closer to the sound source
3. A small vibration means a quiet noise
4. The harder the blow the bigger the vibration is and amplitude
5. The amplitude of a sound wave tells us how big the vibrations are

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