| A | B |
|---|
| Rotation | This is what causes night and day |
| 365 | The number of rotations that the Earth makes in 1 year |
| Revolution | This is Earth's yearly orbit around the Sun |
| Earth's tilt | This is what causes the seasons |
| Equinox | This is when the total number of daylight hours = the total number of nighttime hours |
| Solstice | This is the point at which the sun reaches its greatest distance North or South of the equator. |
| Summer Solstice | This is the "longest" day of the year |
| Winter Solstice | This is the "shortest" day of the year |
