4. Demography (population and settlement) Flashcards
Is the world evenly distributed?
No
Name an area that is densely populated
western europe
Name an area that is sparsely populated
central Australia
What two factors affect population density?
human and physical
What are the reasons why densely populated areas are dense (name human and physical factors)
Red = Physical
Black = Human
What are the reasons why sparsely populated areas are sparse (name human and physical factors)
Red = Physical
Black = Human
Sparsely populated
A small population, few
people, per km sq.
Densely populated
A high population, lots of
people, per km sq.
Population Density
the number of people / km2
Migration
the movement of people from one place to another.
International Migration
when people move from one country (the source) to another country (the host).
Rural-urban migration
movement of people from rural areas into towns or cities.
Why do people migrate?
Push and pull factors
What is a push factor?
what forces people to leave, for example: unemployment, low wages, war or conflict, lack of medical
care meaning illnesses go untreated; no clean water leading to diseases; poor schools leading to poor education
standards and little chance of getting a job.
What is a pull factor?
something which attracts people to an area or another country. It is basically the push factors reversed.
For example, more jobs and or higher wages, better education and health services, good medical services mean people
can be treated, improving life expectancy.
What is the population explosion causing?
overpopulation in
certain countries and worldwide.
What is overpopulation?
too many people in a
country for the resources available.
What are the consequences of overpopulation?
lack of food, clean water so diseases; pressure on services; pressure on housing leading to more shanty settlements; high energy needs, increasing pollution (Co2 emissions) - link to global warming and climate
When did the population explosion start?
1950
When was the population explosion expected to peak?
2100
Where is most of the population growth occurring?
developing countries
Why is the population growth occurring?
because birth
rates are higher than death rates causing a natural
increase in population.
Natural Increase
population growth due to the
number of births exceeding deaths. (NI=BR >DR)
Birth Rate
number of births per 1000 people/year