1) The document describes an activity to model the phases of the moon using a polystyrene ball, pencil, and lamp. Students will move the "moon" around the stationary "sun" to see how the illuminated portion changes from new moon to full moon and back again over the course of a lunar cycle.
2) Key phases demonstrated include new moon, waxing crescent, first quarter, full moon, waning crescent, and back to new moon over approximately 28 days.
3) Students compare the modeled phases to a moon phase diagram and are encouraged to share their new understanding of the lunar cycle with family.