| A | B |
|---|
| astronomy | study of moon, stars, & objects in space |
| rotation | Earth spinning on axis |
| axis | imaginary line passing through center of earth and poles |
| 1 rotation takes how long? | 24 hours |
| 1 revolution takes how long? | approx. 365 days |
| Polaris | axis points at |
| North Star | Polaris |
| orbit | the Earth's path around the Sun |
| revolution | Earth traveling around the Sun |
| A leap year is how long? | 366 days |
| During leap, February has | 29 days |
| Tilted toward the Sun = | summer |
| Tilted away from the Sun = | winter |
| latitude | distance from equator, North & South |
| solstice | Sun is directly overhead at 23.5 deg at noon |
| winter solstice | shortest day of year |
| summer solstice | longest day of year |
| equinox | Earth is not tilted toward or away from Sun |
| Vernal equinox | beginning of spring |
| Autumnal equinox | beginning of fall |
| in March | vernal equinox |
| in September | autumnal equinox |
| in June | summer solstice |
| in December | winter solstice |
| Tilted at 23.5 degrees | Earth's axis |
| Ellipse | The shape of the Earth's orbit |
| Direction that Earth rotates & revolves | Counterclockwise |
| Hemisphere we live in | Northern |
