Introduction
One of the silicates uses is to make glass and ceramics. To do so, hard, formless material like sand or ceramic clay is heated to high temperatures, turning it into malleable material that can be formed to make drinking glasses, for example, or when lead is added to the molten liquid--crystal glass.
Sound travels through water at approximately 1,440 meters per second while it travels through glass at approximately 4,500 meters per second.
Task
Test wine crystal glasses filling up the with different level of water.
Process
Make a circular motion with a wet finger around the top edge of the glass. Compare sounds.
Evaluation
Conclusion
The different level of water reduces the speed of sound thus creating different pitches.