| A | B |
|---|
| New Moon | Occurs when the Moon is between Earth and the Sun |
| Full Moon | Occurs when all of the Moon's surface facing Earth reflects light. |
| Waxing | More of the illuminated half of the Moon can be seen each night. |
| Waning | You see less of the illuminated half each night. |
| Solar Eclipse | Occurs when the Moon moves directly between the Sun and Earth and casts its shadow over part of the Earth. |
| Lunar Eclipse | When Earth's shadow falls on the Moon. |
| Equinox | Occurs when the Sun is directly above Earth's equator. (Spring/Fall) |
| Solstice | When the Sun reaches it greatest distance north or south of the equator. (Summer/Winter) |
| Revolution | Earth's yearly orbit around the Sun. |
| Ellipse | An elongated, closed curve |
| Sphere | A round 3-Dimensional object. |
| Axis | Imaginary vertical line around which Earth spins. |
| Rotation | The spinning of Earth on its axis. |
