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Human Geography
Chapter 2: Population terms
Term | Definition |
---|---|
Agricultural Density | The ratio of the number of farmers to the total amount of land suitable for agriculture. |
Arable Land | Land suited for agriculture. |
Crude Birth Rate( CBR) | The total number of births in a year for every 1,000 people alive in the society. |
Demographic Transition | The process of change in a society's population from a condition of high crude birth and death rates and low rate of natural increase to a condition of low crude birth and death rates, low rate of natural increase, and a higher total population. |
Crude Death Rate(CDR) | The total number of deaths in a year for every 1,000 people alive in society. |
Dependency Ratio | The number of people who are considered too young to work( under age 15 or over age 64) ,compared to the number of people in their productive years. |
Doubling Time | The number of years needed to double a population, assuming a constant rate of natural increase. |
Elderly Support Ratio | The number of working-age people ( ages 15-64) divided by the number of persons 65 or older. |
Epidemiologic Transition | Distinctive causes of death in each stage of the demographic transition. |
Epidemiology | Branch of medical science concerned with the incidence , distribution,and control of diseases that affect large numbers of people. |
Infant Mortality Rate( IMR) | The total number of deaths in a year among infants under 1 year old for every l,000 live births in a society. |
Life Expectancy | The average number of years an individual can be expected to live, given current social, economic, and medical conditions. Life expectancy of birth is the number of years a newborn infant can expect to live. |
Natural Increase Rate( NIR) | The percentage of a population in a year, computed as the crude birth rate minus the crude death rate. |
Overpopulation | The number of people in an area exceeds the capacity of the environment to support life at a decent standard of living. |
Pandemic | Disease that occurs over a wide geographic area and affects a very high proportion of the population. |
Physiological Density | The number of people per u nit of area of arable land, which is suitable for agriculture. |
Total Fertility Rate(TFR) | The average number of children a woman will have throughout her childbearing years. |