Population Flashcards
What is the definition of birth rate
number of births per 1000 people/year
What is the definition of death rate
number of deaths per 1000 people per year
What is the definition of natural increase
when birth rate is higher than death rate
What is the definition of natural decrease
when death rate is higher than birth rate
What is the definition of Migration
the movement of people in/out of an area
What is the definition of annual population
birth rate minus death rate +/- migration change
what is this?
Demographic transistion model
What is stage one of the demographic transition model like?
Birth rate high
death rate high
population change steady
tribes
What is stage two of the demographic transition model like?
Birth rate: high
Death rate: decreasing
Population: Increasing
most countries in Africa because of low levels of development
What is stage three of the demographic transition model like?
Birth rate: decreasing
death rate: decreasing
Population change: increasing
What is stage four of the demographic transition model like?
birth rate: low
death rate: low
population change: steady
North America, Europe, Australasia because of high levels of economic development and good wuality healthcare
What is stage five of the demographic transition model like?
birth rate: decreasing
death rate: low
population change: decreasing
Germany, Japan, almost UK becuase of aging population
Why might birth rates be high?
parents want children
- to work and earn money
- to look after them in old age
- to continue family name
- for prestige
- to replace other children who have died
- some religeons dont believe in contraception
Why might birth rates be low
children too costly to raise
both parents want to continue their careers
there is more widespread use of family planing methods
pensions and health services care for elderly
as infant mortality rate comes down there is less need to replace children
birth control available
the emancipation of women mean many now want to work and want a career
Why might death rates be high
lack of clean water
lack of food
poor hygiene and sanitation
overcrowding
contgious disease
poverty
constant natural/manmade disasters such as drought and wars
why might death rates be low
clean water
reliable food suppply
good hygiene and sanitation
low population densities
effective vaccinations and health care
rising standards of living
people educated on importance of diet and exercise
widely available medicines and health care
how old are dependant people
under 14 above 65
can’t work and depend on taxes from workers
how old are the independents
between 14 and 65
they earn the money to pay for services
what is the dependecy ratio
the ratio between the dependent and independent population
***describe this population pyramid
What are the problems with rapid population growth in rural areas
Deforestation to grow more food - Sahel in Africa
Water, land, and air polution - Sahel in Africa
What are the problems with rapid populaiton growth in urban areas
Traffic congestion - Rio de Janeiro
Inadequate public services - Rio de Janeiro
What are the problems with rapid population growth in a whole country
Shortages of resources, food and raw materials - Kenya
Unemployment and under-employment