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Human Geography

Chapter 2: Population terms

TermDefinition
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.
Created by: Raelee
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