| A | B |
|---|
| moon phases | changing appearances of the moon as seen from the earth |
| New Moon | the lighted half of the moon is facing the sun, dark side faces the earth |
| waxing | shortly after new moon, more and more of the moons lighted side becomes visible |
| First quarter | week after new moon, you can see half of the lighted side, or 1\4 of moons surface |
| full moon | occurs when all the moons surface facing earth is lit up |
| waning | after full moon, amount of moons lighted side can be seen becomes smaller |
| third quarter | when you can see only half the lighted ohase |
| solareclipse | moon moves directly between sun and the earth and casts a shadow on part of the earth |
| Lunar eclipse | earths shadow falls on the moon |
| maria | dark colored, relatively flat regions |
| rotation | spinning of a object around its axis causes night and day to occur on earth |
| equinox | 2 times a year sun is directly abover earths equator |
| solsitce | 2 times a year, Earths tilt makes the sun reach its greatest angle north or south of the equator |
| ellipse | shape of the earths orbit |
| umbra | darkest portion of the moons shadow |
