When the moon appears to change its shape it creates a pattern called the phases of the moon. The moon's phases are part of the lunar cycle, which is a pattern that repeats every 29 days. The cycle flows counter-clockwise starting at the new moon. Waxing means the lit part of the moon is getting bigger. Waning means the lit part of the moon is getting smaller. Use the chart to help you understand the moon's changing phases.

Now that you've reviewed the phases of the moon, test your skills with the Phases of the Moon Game. Click the arrows to play!