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La Órbita y Rotación de la TierraActivity for Kids
Reloj de Sol DIY
Duration: 30-60 min
Difficulty: Fácil
Cost: $0 a $5
Construye un dispositivo que use la rotación de la Tierra para decir la hora.
Material List
1 Plato de papel
1 Pegamento en barra
1 Pajita flexible
1 Brújula
1 Tijeras
1 Rollo de cinta
1 Lápiz con punta
1 Impresión de la esfera del reloj de sol (enlace para descargar )
Instructions
1 Recorta el reloj de sol y pégalo a un plato de papel.
2 Haz un agujero en el centro del plato con el lápiz.
3 Empuja la pajita a través del orificio y pega con cinta el extremo corto debajo para mantenerlo en su lugar.
4 Saca su reloj de sol al aire libre en un día soleado al mediodía y colócalo en un área plana y soleada.
5 Apunta el reloj de sol hacia el norte con la brújula e inclina la pajilla ligeramente hacia el norte para que arroje una sombra más larga.
6 Observa el reloj de sol durante unas horas. ¡La sombra de la pajita te dice la hora!
Consejo: si te encuentras en el hemisferio sur, en cualquier lugar donde las instrucciones anteriores digan norte, debes usar el sur.
How It Works
El sol que brilla sobre la pajita crea una sombra en el reloj de sol. En el hemisferio norte, la sombra apunta hacia el oeste por la mañana. Alrededor del mediodía, cuando el sol está cerca del punto más alto, la sombra es corta y apunta al norte. Cuando el sol está bajo al final del día, la sombra apunta hacia el este. El reloj de sol simplemente etiqueta cada hora que pasa mientras la Tierra gira. Recuerda que aunque parezca que el sol se mueve por el cielo, ¡en realidad es la Tierra la que está girando!
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