| A | B |
|---|
| artithmatic density | total # of people/total land area |
| hearth | region from which innovative ideas orignate |
| cultural ecology | geographic approach that emphasizes human environment relationships |
| density | frequency with which something exists within a given unit of an area |
| diffusion | process of spread of a future or trend from one place to another over time |
| distribution | arrangement of something across earth's surface |
| agricultural density | ration of the number of farmers to the toal amount of land suitable for agriculture |
| Greenwhich mean time | 0 * longitude |
| expansion diffusion | spread of a feature or trend from one area to another in a snowballing process |
| concentration | spread of something over a given area |
| international date line | 180* longitude |
| distance decay | diminishing in importance and eventual disappearance of a phenomenon with increasing distance from its origin |
| hieararchial diffusion | spread of a feature or trend from one key person or node of authority |
