| A | B |
|---|
| latitude | A measurement of distance from the equator expressed in degrees north or south. |
| axis | An imaginary line that passes through Earth's center and the North and South poles, about which Earth rotates. |
| rotation | The spinning motion of a planet on its axis. |
| revolution | The movement of an object around another object. |
| orbit | The path of an object as it revolves around another object in space. |
| vernal eqinox | The day of the year that marks the beginning of spring in the Northern Hemisphere. |
| autumnal equinox | The day of the year that marks the beginning of fall in the Northern Hemisphere. |
| 24 hours | The time it takes for earth to make one full rotation. |
| 365 1/4 Days | The time it takes for earth to make one full revolution. |
| 1/2 of the earth | hemishere |
| summer solstice | the longest day of the year |
| winter solstice | the shortest day of the year |
| winter | When the axis is tilted away from the sun, it's this season for us. |
| summer | When the axis is tilted toward the sun, it's this season for us. |
| 23.5 degrees | Earth's tilt |
