Birth Rate - Number of live births per 1000 population per annum.
Death Rate - Number of deaths per 1000 population per annum.
Fertility Rate - Average number of children per woman.
Infant Mortality Rate - Number of children under the age of 1 who died per 1000 live births.
Life Expectancy - Average age somebody can expect to live in a certain country.
Natural Population Increase - Difference between birth and death rate.
Total Population Increase - (Difference between birth and death rate) +- migration.
Net Migration Gain/Loss - Immigration - emmigration.
Net Population Change - (Birth Rate + immigration) - (death rate + emmigration).
Economic Migrant - Move to seek better work oppourtunities.
Forced Migrant - People who have no choice but to move because they face persecution or death in their own country.
Environmental Migrant - People forced to move because of natural disasters or climate change.
Refugee - A person unable or unwilling to return to their homeland: for fear of persecution based on reasons of face, religion, or ethnicity; focibly displaced by other factors e.g. a natural disaster.
Asylum Seeker - A refugee who formally applies to reside in a country when they arrive.
Push Factor - Those features of a place that make people want to move away.
Pull Factor - Those features of a place which attract people to the area.
Distance Decay - The further you migrate, the fewer people choose to migrate.
Brain Drain - Loss of some of the most skilled workers.
Remittances - The money sent back by workers to support their families.
Circular Migration - Migrants move to an urban area to find work but then return home.
Counter-Urbanisation - The trend of people moving from towns and cities to the rural countryside.
Rural-Urban Continuum - The change from urban high rise to open countryside happens gradually.