| Term | Definition |
|---|---|
| The spinning motion of Earth on its axis | Rotation |
| The study of the moon, stars, and other objects in space. | Astronomy |
| The different shapes of the moon you see from Earth | Phases |
| The imaginary line that passes through Earths center and the north or south of the equator. | Axis |
| The 2 days of the year on which the sun reaches its greatest distance north or south of the equator | Solstice |
| Earths path as it revolves around the sun | Orbit |
| The movement of one object around the other | Revolution |
| The cyclical rise or fall of ocean water | Tide |
| A round pit on the moons surface | Crater |
| The darkest part of the moons shadow | Umbra |
| Dark, flat areas on the moons surface | Maria |
| The part of the shadow that surrounds the darkest part |
