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