Matching Pairs Demographic Terms extendedOnline version here are the key words and their definitions that we will use in this population unit by Miss T Jack 1 Rate of Natural Increase (RNI) 2 Death Rate (DR) 3 Dependency Load 4 Rule of 70 5 Refugee 6 Rapid Growth pyramid 7 Emigration Rate (ER) 8 Working Cohort 9 Birth Rate (BR) 10 Demography 11 Slow Growth pyramid 12 Immigration Rate (IR) 13 Replacement Rate 14 Stable/declining Growth pyramid 15 Net Migration Rate (NMR) 16 Life Expectancy someone who flees their homeland for fear of their life but will return home when it is safe to do so the (“magic”) number of 2.1 children to keep the population stable has many babies being born and few people living a long life the difference between people coming (IR) and people leaving (ER) the relationship between the # of births and the size of the population. the percentage of a country’s population who are younger than 15 and older than 65 (i.e. financially rely on others) the # of people who permanently move to another country how long a person is predicted to live. very few babies are being born and more people who have lived long lives are dying of old age the study of human population numbers, distribution, trends, and issues. the ages of 15-64 in a population pyramid that are not considered part of the dependency load 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 formula to determine how quickly a population doubles in size the difference between births (BR) and deaths (DR) that tells us if the population is growing without migration all ages are roughly equal; fewer babies are now being born; representative of Canada