| A | B |
| Moon | A natural object that orbits a planet |
| Rotation | The spinning of a planet or moon on its axis |
| Revolution | The orbit of a natural object around another |
| Phase | The changes in how the moon looks to people on Earth |
| Gravity | A force that pulls objects together |
| Tide | The rise and fall of the water level of the ocean near the shore that is caused by the moon’s pull of gravity |
| Waxing | The building up of light we see reflected from the moon’s surface |
| Waning | The decreasing of light we see reflected from the moon’s surface |