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| Longitude | The angular distance East or West on the Earth's surface from the Prime Meridian. |
| Latitude | The angular distance North or South from the equator of a point on the Earth's surface. |
| Meridian | Another name for a line of Longitude. |
| Parallel | Another name for a line of latitude. |
| Equator | The great circle of the earth that is equal distance from the north pole and the south pole. |
| Arctic Circle | An imaginary line drawn parallel to the equator, at 66 1/2 degree's North. |
| Antarctic Circle | An imaginary line drawn parallel to the equator, at 66 1/2 degree's South. |
| Tropic of Cancer | One of two corresponding parallels of latitude on the globe, at about 23 1/2 degree's North of the equator. |
| Tropic of Capricorn | One of two corresponding parallels of latitude on the globe, at about 23 1/2 degree's South of the equator. |
| International Date Line | A theoretical line following approximately the 180th meridian, the regions to the east of which are counted as being one day earlier in the calendar dates that the regions to the west. |
| Relative Location | A point or place in relation to another point or place. |
| Delta | The flat alluvial area at the mouth of some rivers where the mainstream splits up into several distributions like at the end of the Mississippi River. |
| Isthmus | A narrow strip of land, bordered on both sides by water, connecting two larger bodies of land. |
| Strait | A narrow passage of water connecting two larger bodies of water. |
| Relief | The differences in elevation and slope between the higher and lower parts of the land surface of a given area. |
| Elevation | The altitude of a place above sea level or ground level. |
| Absolute Location | The exact location of a place,given in degrees north or south latitude and east or west degrees longitude. |
