| A | B |
|---|
| Equinox | when neither hemisphere is tilted toward or away from sun |
| constellations appear to move | Earth revolves around Sun and we see different stars |
| Phases | different shapes of moon as seen from Earth |
| Solar Eclipse | SME (Sun Moon Earth) |
| Lunar Eclipse | MES (Moon Earth Sun); occurs during full moon |
| umbra | darkest part of shadow; total shadow |
| penumbra | lighter part of shadow; partial shadow |
| neap tide | pulls on Earth's water coming at right angles; medium tide |
| spring tide | highest tides and lowest tides; pull of gravity coming at level angle |
| maria | ancient lava on moon |
| crater | round pits in moon's surface |
| size of moon | about 1/4 the diameter of Earth |
| revolution | move around another object |
| year | time it takes Earth to revolve around Sun |
| rotation | spin in place |
| month | time it takes Earth to rotate |
