Un reloj de sol es la herramienta más antigua que se usa para saber la hora. Haz un reloj de sol simple usando piedras, un plato de papel y un lápiz. Siga el movimiento de la sombra que produce el sol a lo largo del día. A sundial is the oldest tool used to tell time. Make a simple sundial using rocks, a paper plate, and a pencil. Track how the shadow made by the sun moves throughout the day.
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