population density and distribution.
People are unevenly distributed around the world. The difference in distribution is measured by comparing population density - the number of people per square kilometre (km²).
Population density is determined more by environmental factors which make an area more or less attractive to settlers than by economic development.
Population density=total population
Total land area Km2
Choropleth maps are used to represent population density. Factors affecting population density, include:
- Physical factors-Relief, Soil, Climate, Water e.t.c
- Human factors- Economic, Political, Social.
Population distribution is the way that people are spread across the earths surface.
Population growth is the increase/decrease in the number of people in an area.
Population growth can be affected, by:
- Birth rate- Is the number of live birth in a year for every 1000 people.
- Death rate- Is the average number of deaths in a year for every 1000 people.
%DR= No.of deaths x 100%
%BR= No. of live births x 100%
Demographic transition model.( DTM)
This is a graph that shows the relationship, between population and economic development, of different countries.
Weaknesses of the model.
- It was Eurocentric.
- Some countries in LEDC's cannot reach stage 4.
- MEDC's have moved above stage 5.
- NIC's are moving at faster rates from one stage to another, unlike their counterparts.