| A | B |
| ROTATION | spinning on an axis |
| REVOLUTION | going around something else |
| 15 DEGREES PER HR | how fast Sun appears to move across sky |
| GEOCENTRIC MODEL | has Earth in center |
| HELIOCENTRIC MODEL | has Sun in center |
| FOUCAULT PENDULUM | weight hanging from wire that changes direction of swing |
| CORIOLIS EFFECT | objects veer off to RIGHT in N. Hemisphere |
| TIME ZONES | 15 degrees wide...each has its own time |
| TIDES | cyclic rise and fall of ocean water |
| SOLAR ECLIPSE | when the moon blocks out the Sun's light |