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    Lawrence Hall of Science
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    En esta actividad, Mateo y Cientina enseñan a usar modelos para ver las causas de las fases lunares. Usando un foco de lámpara, una naranja y sus cabezas para representar el sol, la luna y la...

    free Ages 8 - 14 5 to 10 minutes
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    PhET
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    In this online activity, learners build their own system of heavenly bodies and watch the gravitational ballet. With this orbit simulator, learners can set initial positions, velocities, and masses...

    free Ages 11 - adult 10 to 30 minutes

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