Demography
The study of population, size, composition, growth and distribution
Population equation
Fertility - morality +/- migration
Malthus theorem
Thought the food supply increases arithmetically populations grow geometrically.
Population pyramid
Shows the age/sex distribution of a population.
Urbanization
50% of U.S population lives in urban areas of 1m+
Demographic transition
Stage 1: High birth rates and high death rates
Stage 2: High birth rates and low death rates
Stage 3: Dropping birth rates
Stage 4: Stability population with low birth and low death rates.