Materials:

• 5 or more drinking glasses or glass bottles
• Water
• Wooden stick such as a pencil

Instructions:

• Line the glasses up next to each other and fill them with different amounts of water.
• The first should have just a little water while the last should almost full, the ones in between should have slightly more than the last.
• Hit the glass with the least amount of water and observe the sound, then hit the glass with the most water, which makes the higher sound?
• Hit the other glasses and see what noise they make, see if you can get a tune going by hitting the glasses in a certain order.

• Each of the glasses will have a different tone when hit with the pencil
• The glass with the most water will have the lowest tone while the glass with the least water will have the highest.
• Small vibrations are made when you hit the glass, this creates sound waves which travel through the water.
• More water means slower vibrations and a deeper tone.