Edexcel Geography Unit 2 - Population Dynamics

POPULATION DYNAMICS

2008 - 6.7 billion people

Total Fertility Rate - average number of children a woman has in her lifetime.

Birth Rate - no. births per 1000 a year

Death Rate - no. deaths per 1000 a year

Natural Increase - difference between birth rate and death rate

Infant Mortality - no. children under one who have died

Factors Contributing to Fall in Mortality

• Development of modern medicines
• Intorduction of vaccines and immunisations
• Better healthcare
• More hygienic housing
• Cleaner drinking water and sewage disposal
• Better diet

Stage 1 - High Fluctuating 

Period of high birth and death rates

Reasons for this:

• Little or no birth control
• High infant mortality rate
• Children seen as asset and status symbol
• High infant mortality
• High incidence of disease
• Poor nutrtiion or famine
• Poor housing and hygiene
• Little healthcare

Stage 2 - Early Expanding

High Birth rates but…