| A | B |
|---|
| Orbit | A regular curved path followed by an object around another object |
| Revolution | The movement of an object around another object. |
| Rotation | The spinning of an object about an axis. |
| Lunar Highlands | The mountainous areas of the moon |
| Maria | The smooth dark areas of the moon. |
| Lunar Eclipse | The moon passing into the shadow of the Earth. |
| Solar eclipse | The moon passes in front of the Sun and blocks the Sun from view. |
| Tides | An alternate rise and fall in sea level caused by the moon's gravitational influence. |
| Neap Tides | The Sun,Moon, and Earth form a right angle. |
| Spring Tides | The Sun, Moon, and Earth are aligned. |
