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Population Definitions
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Gravity
Terms in this set (14)
Child mortality
The probability that a newborn baby will die before reaching age five expressed per 1,000 live births.
Total fertility rate
The average number of children born per woman in her lifetime.
Sex ratio
The ratio of the number of males for each female in a population.
Natural increase
The difference between the birth rate and the death rate. This does not include changes due to migration.
Population growth rate
The average annual percent change in the population, resulting from a surplus (or deficit) of births over deaths and the balance of migrants entering and leaving a country. The rate may be positive or negative.
Life expectancy
The number of years a person can expect to live based on the average living conditions within a country.
Death rate
The number of deaths per thousand of the population per year.
Infant mortality rate
The number of deaths in children under 1 year of age per 1000 live births in the same year.
Dependency ratio
This ratio compares the percentage of population available for work (15 - 64) and those economically inactive. It is calculated by dividing all children aged 14 and under plus those aged 65 and over by the number of adults aged 15 - 64.
Replacement rate
The number of children each woman would need to have in order to ensure a stable population level. That is, to 'replace' its parents. This fertility rate is 2.1 children.
Population density
The number of people within a given area, usually per square kilometre.
Birth rate
The number of live births per thousand of the population per year.
Population structure
The number or percentage of males and females in a particular age group.
Migration
The movement of people from one place to another.
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