| A | B |
|---|
| solstice | longest & shortest amounts of daylight |
| equinox | same |
| vernal | 1st day of spring |
| autumnal | equinox |
| winter solstice | shortest amount of daylight hours |
| summer solstice | 1st day of summer |
| revolution | 365 1/4 days |
| leap year | feb. 29th |
| rotation | spins on axis |
| seasons | axis tilted, and revolution |
| equator | suns rays hit directly all year long |
| hemisheres | 2 |
| southern hemisphere tilted in towards sun | summertime |
| fall and spring | neither hemisphere tilted in towards sun |
| dec 21st | winter solstice |
| march 21st | vernal equinox |
| west to east | counterclockwise |
| counterclockwise rotation | sun appears to rise in east and sets in west |
| 2 days when sun reaches its greatest distance north or south of the equator | solstice |
| creates day and night | rotation |
| calendar year is based on this | earth's revolution |
