The physical character of a place
Site
The transfer of money by workers to people in the country from which they emigrated
Remittances
The rapid, widespread diffusion of a feature or trend throughout a population
Contagious Diffusion
Culture found in a large, heterogeneous society that shares certain habits despite differences in other personal characteristics
Popular Culture
Degradation of land, especially in semiarid areas, primarily because of human actions such as excessive crop planting, animal grazing, and tree cutting.
Desertification
Mercator Projection
The number of people per unit area of arable land, which is land suitable for agriculture.
Physiological Density
A language mutually understood and commonly used in trade by people who have different native languages
Lingua Franca
Culture traditionally practiced by a small, homogenous, rural group living in relative isolation from other groups.
Folk Culture
Agriculture designed primarily to provide for direct consumption by the farmer and the farmer's family
Subsistence Agriculture
The location of a place relative to another place.
Situation
The total number of people divided by the total land area
Arithmetic Density
The spread of a feature or trend through bodily movement of people from one place to another
Relocation Diffusion
A process by which real estate agents convince white property owners to sell their houses at low prices because of fear that persons of color will soon move into the neighborhood
Blockbusting
The cultivation of seafood under controlled conditions
Aquaculture

Robinson Projection
The ratio of the number of farmers to the total amount of arable land (land suitable for agriculture).
Agricultural Density
A language that results from the mixing of a colonizer's language with the indigenous language of the people being dominated
Creole (or creolized) Language
Laws (no longer in effect) in South Africa that physically separated different races into different geographic areas.
Apartheid
The rapid diffusion of new agricultural technology, especially new high-yield seeds and fertilizers.
Green Revolution
An approach to geography that emphasizes the relationships among social and physical phenomena in a particular study area.
Cultural Landscape
Thomas Malthus
A boundary that separates regions in which different language uses predominate
Isogloss
A process by which financial institutions draw red-colored lines on a map and refuse to lend money for people to purchase or improve property within the lines
Redlining
A model used to help explain the importance of proximity to the market in the choice of crops on commercial farms. This model was originally developed for a small region with a single market center, but the model is also applicable on a national or global scale.
Von Thunen Model