Sundial, A device that uses the sun’s shadow to show the time., Water clock, A device that measures time by the flow of water., Hourglass, A device with sand inside; the sand falls from one part to another to measure time., Candle clock, A candle with marks on it; as the candle burns down, it shows the passing of time., Mechanical clock, A clock that uses gears and springs to keep, Pendulum clock, A clock that measures time using a swinging pendulum..

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