Saturday, August 05, 2006
GEOG - Population
Birth rate
No. of births x 1000 / Total population
<20 - low
20-30 - medium
>30 - high
Death rate
No. of death x 1000 / Total population
<10 - very low
10-15 - low
15-20 - high
>20 - very high
Natural increase - natural growth in population resulting from an excuess of births over deaths
Natural decrease - natural decrease in population when death rate exceeds the birth rate
Net migration - immigrants(entering country) minus emigrants (leaving country) [either positive or negative]
Zero population growth - birth rate = death rate
Population Explosion - large and rapid increase in population
Life expectancy - length of time a person born in a given area can expect to live
Infant mortality - number of babies who die before reaching one year old
No. of infant death x 1000 / No. of babies born alive
Total fertility rate - average number of children each woman would bear in her child bearing years
Replacemet fertility level - level of fertility at which a given population is replacing itself
Dependent population - population that depends on the working population to support economically (children - young dependents, the aged - old dependents)
[dependents x 100 / working age adults = number of dependents per 100 working age adults]
Sex Ratio - number of males to every 1oo females (high in areas with more male employing activities)
No. of births x 1000 / Total population
<20 - low
20-30 - medium
>30 - high
Death rate
No. of death x 1000 / Total population
<10 - very low
10-15 - low
15-20 - high
>20 - very high
Natural increase - natural growth in population resulting from an excuess of births over deaths
Natural decrease - natural decrease in population when death rate exceeds the birth rate
Net migration - immigrants(entering country) minus emigrants (leaving country) [either positive or negative]
Zero population growth - birth rate = death rate
Population Explosion - large and rapid increase in population
Life expectancy - length of time a person born in a given area can expect to live
Infant mortality - number of babies who die before reaching one year old
No. of infant death x 1000 / No. of babies born alive
Total fertility rate - average number of children each woman would bear in her child bearing years
Replacemet fertility level - level of fertility at which a given population is replacing itself
Dependent population - population that depends on the working population to support economically (children - young dependents, the aged - old dependents)
[dependents x 100 / working age adults = number of dependents per 100 working age adults]
Sex Ratio - number of males to every 1oo females (high in areas with more male employing activities)
