| A | B |
|---|
| Axis | imaginary vertical line in which the Earth spins |
| Ellipse | elongated closed curve |
| Equinox | occurs when the Sun is directly above the Earth's equator |
| Full moon | when all of the Moon's surface facing Earth reflects light |
| Impact basin | the depression left behind by an object striking the Moon |
| Lunar eclipse | Earth's shadow on the Moon |
| Maria | flat, dark regions on the Moon |
| Moon phase | different forms that a Moon takes in its appearance from the Earth |
| New moon | the Moon is between the Earth and Sun |
| Revolution | Earth's yearly orbit around the Sun |
| Rotation | the spinning of the Earth on its axis |
| Solar eclipse | Moon moves directly between the Sun and the Earth and cast a shadow over part of the Earth |
| Solstice | Sun reaches its greatest distance norh or south of the equator |
| Sphere | a round, three dimensional object |
| Waning | after the full Moon, you see less of the Moon's illuminated half each night |
| Waxing | after a new Moon, more of the illuminated Moon can be seen at each night |
