This is a blog of the 4th grade class in la Farigola de Vallcarca School in Barcelona. This year we are doing “Aula de Ciències” in English.
In this blog we want to show you the experiments we do in our Science Lab. Science is fun!

divendres, 9 d’abril de 2010


Materials: - A bowl - An elastic band - Plastic film - Toilet paper - A radio Instructions: Stretch a piece of plastic film across the top of the bowl. Lay tiny pieces of toilet paper on. Place the bowl next to the radio. Turn on the radio. Turn up the volume. The toilet paper starts to move. Why: The sound from the radio makes air vibrate. If the music is very loud, vibrations are stronger. Vibrations make the plastic film vibrate, so the tiny pieces of toilet paper move too. Different styles of music have different speeds of vibration.

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