| A | B |
|---|
| latitude | angular distance north or south of equator |
| time zone | area 15 degrees wide in which time is the same |
| International Date Line | line drawn through the Pacific Ocean directly opposite the Prime Meridian; starting point for worldwide system of measuring time |
| Prime Meridian | imaginary line drawn on Earth that passes through Greenwich, England |
| rotation | spinning of Earth on its axis |
| Earth's axis | imaginary line drawn through Earth from rotational north pole to rotational south pole |
| revolution | motion of Earthin its orbit around the Sun |
| ecliptic | apparent path of Sun during the year; plane of Earth's orbit around the Sun |
| zodiac | 12 constellations through which we observe the Sun moving during the year |
| equinox | Earth's axis is perpendicular to line drawn from center of Earth to center |
| solstice | Earth's rotational axis is tilted directly toward or away from the Sun |
