Definitions Flashcards
natural increase
increase in pop resulting from births exceeding deaths
natural decrease
decrease in pop resulting from deaths exceeding births
Replacement level
threshold between NI and ND
Populations are thought to be statice when the fertility rate is 2.1 children per women
Death rate
the no. of live births recorded in a single year per 1000 people in the total population of a country
world avg 19/1000
death rates
number of deaths recorded in a single year per 1000 people in the total pop of a country
world avg 8/1000
infant mortality rate
number of deaths occuring per 1000 live births for children under the age of 1 during a year in the total pop of a country
world avg 34/1000
total fertility rate
avg number of children a woman of childbearing years would have in her lifetime, if she had children at the current rate for her country
wrld avg 2.4
Population structure made up of
age, gender
Population structure
breakdown of a country’s population into groups defined by age and sex
dependency ratio
shows how many old and young people depend on people of working age
( (% under 15) + (% over 65) )/ % between 15 and 64
x100
dependency
reliance for survival on support from others
Demographic transition
shifting balance between fertility and mortality over time and its impact on rates of population change
carrying capacity
maximum number of peolple that can be supported by the resources and technology of a given area
optimum population
when there is a balance between the population size and the amount of resources available
sex ratio
number of males per 100 females in a population
