Matching Pairs PopulationOnline version Definitions of population by lucia sainz diez 1 Immigration 2 Death rate 3 Birth rate 4 Emigration 5 Migration 6 Demography 7 Life expectancy 8 Fertility rate Give us the average number of children per woman Is the number who die for every 1000 people . Refers to the number of years a person is expected to live Is when the people come to live in a new country Is the number of babies born in a year for every 1000 people Is when the people leave their country to live in another country Is the study of human population Is another factor that causes population change.