7. Fertility, Mortality, and Migration (Demographic factors in population chance) Demography -derived from the Greek words demos or man, means the statistical study of population size, density, distribution and vital statistics , and its effects on the socioeconomic conditions of the community.
8. Fertility -refers to live births that occur within a Population. Mortality -refers to the occurrence of death. Migration -it is the movement of people into or out of an area for the purpose of establishing new permanent residences in the area of destination.
9. Types of migration Internal migration -refers to the movement of people within a country, region or town. External migration -refers to the movement of people from one country to another country. emigrants -people leaving the country. Immigrants -people arriving in another country.
