Transcript wg 5.11
Chapter 5 Section 1
World Geography
Population Geography
Pg. 87
Studying Population
Study the relationships between populations
and the environment.
Demography – the statistical study of
human populations.
Use these numbers to forecast what the
population will be like in the future.
Population Density
The average number of people living in an
area.
Persons per square mile.
You can tell how large a country is, or
discover what areas they live in.
Population Distribution
About 90% of the world’s people live in the
Northern Hemisphere.
Lowland areas are heavily populated.
People tend to live in areas that are
favorable for settlement.
Population Change
The number of people in an area are a result
of these 3 factors:
– Birthrate – number of birth per 1,000 in one
year.
– Death rate – number of deaths per 1,000 per
year.
– Migration – people moving from one place to
another.
Migration
Geographers – study migration by analyzing
push factors and pull factors. Push factors
are what causes people to leave one place.
Pull factors – attracts people to a location.
Natural Increase
Rate of natural population growth. Number
of birth and deaths in a year.
Highest rates of increase are found in Africa
and Southwest Asia.
Lowest rates of increase are in Europe and
North America.
World Population Trends
Number of people is increasing by 80
million per year.
Some worry about overpopulation. This
exists when the number of people is too
large to be supported by available resources.
No one knows for sure how many people
the world can support.
The Demographic Transition
A model that shows how birthrates and
death rates dropped in many western
countries as they developed modern
economies.
Most of the world’s richest and
technological advanced countries have had
their birthrates drop.
Future Populations
Population projections are estimates of a
future population’s size, age, growth rate, or
other characteristics based on current data.
All countries will face population-related
challenges. Ex: caring for growing number
of children or older people.