arithmetic density
number of people ÷ land area
physiological density
number of people ÷ arable land
agricultural density
number of farmers ÷ arable land
epidemiological transition model
describes changes in fertility, mortality, life expectancy, and population age distribution, largely as the result of change and causes of death
economic factors that influence where people live
job opportunities, money, higher wages(PULL), lower wages(PUSH)
Political factors that influence where people live
promises of peace and freedom, war
social factors that influence where people live
religious freedom(PULL), discrimination(PUSH), education
environmental factors that influence where people live
water, natural disasters
carrying capacity
maximum population that an environment can sustain
crude birth rate
The number of births in a given year per 1000 people in a given population
crude death rate
The number of deaths in a given population per year per 1000 people
total fertility rate
the average number of children one woman in a given country or region will have during her childbearing years
infant mortality rate
Number of deaths of children, under age of 1 per 1000 live births
life expectancy
average number of years a person is expected to live
sex ratio
this ratio represents the proportion of males to females in a population
dependency ratio
the number of people in a dependent age group (below 15 or above 65) divided by the number of people in the working age group (15 through 64) then multiplied by 100
population pyramid
used to interpret the implications of the changing structure of a population. They show the age – sex distribution of a given population.
rate of natural increase (RNI or NIR)
The difference between the crude birth rate and the crude death rate of a defying group of people
malthus’s theorem
A theory based on the promise that exponential population growth will outpace the increase in resources. Thomas Mathis was wrong.
neo-malthusians
A new school of thought that vases concerns about sustainable use of the planet, (earths resources can only support finite population.)
they are kinda right
pro-natalist
policies, encouraging births, and aim to accelerate population growth
anti-natalist
those designed to curb population growth by discouraging citizens from having children
quotas
limits on the number of immigrants allowed into the country each year
ravenstein’s laws on migration
there’s 10 (here’s 5 main ones)
1) most people move a short distance- because of distance decay and friction of distance
2) families are less likely to move
3) international migrants move to a big city
4) as people move in, people move out (counter migration)
5)most people move rural to urban