Matching Pairs Introduction to PopulationOnline version An introduction to the study of population. by Patricia Gawlik 1 Birth rate 2 Ethnic origin 3 Immigration 4 Median 5 Death rate 6 Census 7 Demography 8 Emigration The study of changes that occur over a period of time in human populations. To leave your country of origin to live permanently in another country. The number, in a series of numbers, that is larger than half the other numbers and smaller than the other half. A number that shows how many people died in a particular place or during a particular time. A survey of population figures taken by a country's national government, normally every five or ten years. To move to a country other than ones' native country. A number that shows how many babies are born in a particular place or during a particular time The racial of cultural background a person comes from.