| A | B |
|---|
| The reason why our seasons change on Earth | Earth'stilt |
| When days and nights are of equal length | equinox |
| imaginary line that runs through the center of the earth and the poles | axis |
| 365 and one-fourth days | year |
| a point at which days are longest in one hemisphere and shortest in another hemisphere | solstice |
| this solstice has the longest daylight hours | summer |
| a system of stars | galaxy |
| The Galaxy that Earth is part of | Milky Way |
| 0 degrees longitude which is the starting point for our time zones | Prime Meridian |
| Areas of the Earth that share the same time | time zones |
| The path one object makes as it moves around another object | orbit |
| This causes day and night here on Earth | rotation |
