Matching Pairs Demographic TermsOnline version here are some key words and their definitions that are connected with studying population by Miss T Jack 1 Replacement Rate 2 Refugee 3 Dependency Load 4 Birth Rate (BR) 5 Emigration Rate (ER) 6 Death Rate (DR) 7 Immigration Rate (IR) 8 Life Expectancy the # of people who permanently move to another country the (“magic”) number of 2.1 children to keep the population stable someone who flees their homeland for fear of their life but will return home when it is safe to do so the relationship between the # of births and the size of the population. the # of people who permanently leave their home country with the intention of staying there the relationship between the # of deaths and size of the population. how long a person is predicted to live. the percentage of a country’s population who are younger than 15 and older than 65 (i.e. financially rely on others)