| A | B |
|---|
| solstices | longest & shortest days of the year |
| equinox | 12 hours of day & 12 hours of night |
| vernal equinox | 1st day of spring |
| autumnal equinox | 1st day of fall |
| winter solstice | shortest day in Northern Hemisphere |
| summer solstice | longest day in Northern Hemisphere |
| revolve | one body orbits around another |
| rotate | an object spining on its axis |
| seasons | axis tilted, and revolution |
| fall and spring | neither hemisphere tilted in towards sun |
| December 21st | winter solstice |
| March 21st | vernal equinox |
| 2 days when Earth's axis points towards/away from the sun | solstices |
| makes day and night | Earth's rotation |
| ellipse | shape of Earth's orbit |
| angle of the tilt of Earth's axis | 23.5 |
| Earth's axis | makesseasons |
| length of Earth's revolution | 365 1/4 days |
| length of Earth's rotation | 24 hours |
