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