| A | B |
|---|
| Axis | a line connecting the North Pole to the South Pole |
| Crescent | Moon phase in which less than half of the Moon appears to be illuminated |
| First Quarter | Moon phase in which exactly half of the Moon appears to be illuminated(occurs when the Moon has gone one quarter of the way around Earth) |
| Full Moon | Moon phase in which all of the Moon appears to be illuminated |
| Gibbous | Moon phase in which more than half of the Moon appears to be illuminated |
| illuminate | to brighten with light |
| New Moon | Moon phase in which none of the Moon appears to be illuminated |
| Orbit | the path of a celestial body(such as a moon or a planet) around a larger celestial body |
| Revolve | to move around a central point |
| rotate | to spin on an axis |
| Third Quarter | Moon phase in which exactly half of the Moon appears to be illuminated(occurs when the Moon has gone three quarters of the way around Earth) |
| Waning | decreasing in size |
| Waxing | increasing in size |
