Clock movements, also known as clock mechanisms or movements, are the internal components that power a clock and keep time. They convert energy from a power source, such as a battery or a wound spring, into precise movements of the clock hands. There are two main types of clock movements: quartz and mechanical. Quartz movements use electronic oscillations to maintain accuracy, while mechanical movements rely on gears and springs. The design of clock movements can vary widely, affecting the clock's features and functionality. Some movements allow for additional features like chimes or date displays, while others focus solely on timekeeping. Understanding clock movements is essential for anyone interested in clock repair or design, as they are the heart of any timekeeping device.