| A | B |
|---|
| solstice | longest & shortest amounts of daylight |
| equinox | day and night hours are equal |
| vernal | 1st day of spring |
| autumnal | 1st day of fall |
| winter solstice | shortest amount of daylight hours |
| summer solstice | longest day of year |
| revolution | Earth orbiting Sun |
| leap day | Feb. 29th |
| rotation | Earth spins on axis |
| Causes seasons? | Earth's tilt |
| equator | suns rays hit directly all year long |
| hemisphere names | Northern and Southern |
| southern hemisphere tilted towards sun | summertime |
| fall equinox and spring equinox | neither hemisphere tilted toward sun |
| December | winter solstice occurs in... |
| March | vernal equinox occurs in... |
| June | summer solstice occurs in... |
| September | autumnal equinox occurs in... |
| 2 days when sun shines directly on its greatest distance north or south of the equator | solstice |
| creates day and night | rotation |
| Seasons are caused by | earth's revolution |
| How long is 1 Earth revolution? | 365 1/4 days |
| How long is 1 Earth rotation? | 23 hours and 56 minutes |
