| A | B |
|---|
| axis | line passing through Earth's cener and poles |
| rotation | movement of Earth around its axis |
| revolution | movement of Earth around the sun |
| orbit | path of Earth as it revolves around the sun |
| calendar | defines the beginning, lenth, and divisioons of a year |
| equinox | when the noon sun is directly overhead at the equator |
| solstice | when the sun is farthest north or south of the equator |
| Happy Valentines | Day! |
