| Term | Definition |
| degrees | units of latitude and longitude |
| equator | an imaginary line that runs around the center of the earth, halfway between the north and south poles at 0 degrees latitude |
| meridians (lines of longitude) | imaginary lines that run from north to south |
| north pole | the point on earth located at 90 degrees north latitude, where the lines of longitude meet |
| parallels (lines of latitude) | imaginary lines that run parallel to the equator. |
| prime meridian | an imaginary line that runs from the north to the south pole at 0 degrees longitude |
| south pole | the point on earth located at 90 degrees south latitude where the lines of longitude meet |