Human Population & Demographics

First Agricultural Revolution

transition from hunting and gathering to cultivating food, fiber, and other animal & plant products 

Plowing

loosens up soil for planting

Breeding

selection of human-desired traits in domesticated species

Industrial revolution

transition from a rural, agrarian society to an urbanized one dominated by machine manufacturing

Life expectancy is most influenced by…

infant mortality

GDP per capita

total value of goods and services produced per year, per person

Emigration

when people leave an area, decreasing population

Immigration

when people move into an area, increasing population

Total fertility rate

the average number of children a woman will have in her lifetime

Doubling time

estimates how long it will take a population to double in size at its current growth rate