🌍 Where People Live
Areas where large numbers of people live close together.
Population Cluster
The ability to have children.
Fertility
The rate that shows whether a population is growing or shrinking
Natural increase rate
A graph that shows population by age and gender
Population pyramid
A disease outbreak that spreads worldwide.
Pandemic
The number of people per unit of land.
Population Density
The number of births per 1,000 people per year.
Crude birth rate
The formula for natural increase rate
(Birth rate − Death rate) ÷ 10
Which side of the pyramid shows males
Left side
A deadly disease that killed millions in Europe during the 1300s.
Bubonic Plague
When too many people live in an area for available resources
Overpopulation
The average number of children a woman will have in her lifetime.
Total fertility rate
What does a positive natural increase rate mean
The population is growing
A pyramid with a wide base and rapid population growth.
Expansion pyramid
The Bubonic Plague caused Europe’s population to do what?
Decline
When a population shrinks over time
Population decline
The number of deaths per 1,000 people per year
Crude death rate
Two factors that most directly affect population growth
Birth rates and death rates
A pyramid with straight sides and little change in population.
Stable pyramid
What happened to population pyramids after the Bubonic Plague?
They showed missing age groups and population loss
Rapid population growth over time
Population expansion
The average number of years a person is expected to live
Life expectancy
What does a positive natural increase rate mean?
The population is growing
A pyramid with a narrow base and a shrinking population.
Negative pyramid
A period of rapid global population growth after 1950
Post-1950 population explosion