This fun experiment will let you make your very own glass xylophone that plays sweet melodies!
What you need:
What you do:
- 6 tall glasses
- Food colouring
- Metal/wooden spoon or wooden popsicle sticks
What's going on?
- Line up the glasses in a row.
- Tap gently on each of the glasses. What sort of sound is created? Do the glasses all make the same sound?
- Put the water in the jug and mix in the food colouring.
- Carefully pour the water into the glasses, making sure there is a different level of water in each glass.
- Tap the glasses again. What sort of noise do they make now? Do all of the glasses make the same sound now?
- Try and vary the tones by changing the amounts of water.
- Adjust the musical notes that are created by adding more or less water to each glass and create a tune!
When you tap the glasses, you generate sound waves that travel through the glass. When there is water in the glasses, the sound waves are altered as they need to travel through water. The more water is present in a glass, the lower the sound note.