| A | B |
|---|
| Crater | Circular low area surrounded by a rim, usually caused by an object hitting the ground |
| Full moon | Phase of the moon when the Earth is between the sun and the moon |
| Gravity | Force of attraction between two objects |
| Lunar eclipse | Passing of the moon through the Earth's shadow |
| Maria | Low, flat plains, on the moon's surface that appear as dark areas |
| Mass | Amount of material that an object has |
| Meteorite | Piece of rock that hits the surface of a planet or moon after traveling through space |
| New moon | Phase of the moon when the moon is between the sun and the Earth |
| Orbit | Curved path that an object follows as it revolves around another object |
| Phases of the moon | Changes in the moon's appearance as it orbits the Earth |
| Revolution | Movement of one object in its orbit around another object in space |
| Solar eclipse | Passing of the moon between the Earth and the sun |
| Telescope | Instrument that collects light, making faint objects easier to see and enlarging distant objects |
| Tides | Regular rising and falling of the Earth's major bodies of water |
