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12 Cards in this Set
- Front
- Back
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chain migration
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migration of people to a specific location because relatives or emembers of the same nationality previously migrated there.
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dependency ratio
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the number of people under the age of 15 and over age of 64 compared to the number of people active in the labor force
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distance decay
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the diminishing in importance and eventual disapperance of a phenomenon with increasing distance from its origin.
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doubling time
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the number of years needed to double a population, assuming a constant rate of natural increase
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ecumene
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the portion of earth's surface occupied by permanent human settlement
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epidemological transtition
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distinctive causes of death in each stage of the demographic transition
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Thomas Malthus
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food grows arithmetically while population grows exponentially
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neo-malthusain
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agree with malthus becuase pop is growing so much faster because of medical tech. (putting more countries into stage two) and even though many LDC had expanded their food production, they have more poor people than ever before.
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transhumance
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the seasonal migration of livestock between mountains and lowland pastures.
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activity space
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The range or 'spectrum' of environmental conditions and habitat characteristics that support the normal activity of an organism
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cohort
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: Population of various age categories in an age-sex population pyramids. This is important because this can tell what state this country it is whether in Stage 3 or Stage 5 in the demographic transition model.
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step migration
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a series of small, less extreme locational changes are steps. For example, if a person moves from a farm to a small town, then to a larger town and finally a city, it is an example of step migration
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