| A | B |
|---|
| maria | dark-colored relatively flat regions on the Moon's surface |
| craters | depressions on Moon caused by meteorites, asteroids & comets |
| lunar eclipse | When Earth's shadow falls on the moon; begins when the moon moves into Earth's penumbra |
| solar eclipse | occurs when the moon moves directly between the Sun & Earth and casts a shadow on part of Earth |
| waning | after a full moon, lighted portion that we see begins to appear smaller |
| full moon | we see all of the Moon's lighted side; Moon is on side of Earth opposite from Sun |
| waxing | after new moon, lighted portion we see appears larger each night |
| new moon | Moon is between Earth & Sun, side of Moon facing Earth receives no light from Sun, can't see Moon from Earth |
| moon phases | changing appearances of the Moon as seen from Earth |
| neap tide | Moon & Sun are at right angles to each other, high tide is not as high, low tide is not as low |
| spring tide | Moon & Sun pull together when lined up, high tides are much higher, low tides are much lower than normal |
| tide | rise and fall in sea level |
| lava | molten rock |
