system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does the Quartz in a clock keep accurate time? It's a dumb rock!
gpt
Quartz resonates at very regular frequencies when you pass a small current through it. The watch then monitors that frequency and converts it into hours, minutes, seconds. Since quartz crystals of the same size can always be predicted to resonate at the same amplitude regardless of temperature, this makes for very accurate timekeeping.