5. Name a use of quartz in precision instruments.

Quartz is commonly used in precision instruments such as watches and clocks due to its piezoelectric properties. This means that when an electric current is applied to quartz, it generates a small voltage. This voltage can be used to drive the movement of the watch or clock, providing accurate timekeeping. Quartz is also used in precision instruments like oscilloscopes and radios because of its stability and ability to generate a consistent frequency when an electric current is applied.