In geography, exogenous processes all take place outside the Earth and all the other planets. Weathering, erosion, transportation and sedimentation are the main exogenous processes. Asides from climate, exogenous geographic factors are able to contribute to the overall process of distribution, including densities of populations and urbanizations of certain areas in the world. Exogeneity is proposed to ultimately cause geographic considerations to be rejected. Ludology In ludology, the study of games, an exogenous item is anything outside the game itself. Therefore, an item in a massively multiplayer online game would have exogenous value if people were buying it with real world money rather than in-game currency (though its in-game cost would be endogenous). Noted as exogenous fantasy, one may also refer to this term as extrinsic stimuli or "fantasy"; these describe a "fantasy" (game) that solely relies on the skill being mastered, rather than the other way around. These fantasies also tend to possess a few characteristics, such as (1) understanding that the fantasy and the skill that is being learned are inextricably linked, (2) the fantasy context and the instructional content being provided have an intrinsic and continuous link, and (3) endogenous fantasies tend to include more intellectually challenging and captivating content compared to exogenous fantasies. Materials science In materials science, an exogenous property of a substance is derived from outside or external influences, such as a nano-doped material. References External links Etymology