population.

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%

                                         1000

                       %BR= No. of live births x 100%

                                              1000

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.