1. Population

2. Population
Population is all the inhabitants of a particular town, area, or country.
Population is changed by may factors: births, deaths, and migration.
Population Pyramids show growth trends: stage 1 low population growth, stage 2 rapid population growth, stage 3 slow population growth, stage 4 no or negative population growth.
Population is impacted by Push/Pull factors.
Dilemmas or problems occur when a country experiences the following: Shrinking/Rapid population, Dependency Ratios of either too young or old

3. Population Pyramids
A country’s population can be displayed by age and gender groups on a bar graph called a population pyramid

4. Population Pyramids
These graphs show the ages and sexes in a population, with the youngest at the bottom and eldest at the top.
Age structure of a population is extremely important in understanding similarities and differences among countries
Dependency ratio - number of people too young or too old to work compared to the number of people in their productive years

5. Dependency ratio
To compare dependency ratio of different countries, we can divide the population into three age groups
0 to 14, 15 to 64, and 65 and older
People 0 to 14 and 65 and older are normally classified as dependents

6. Three Types of Growth

7. High Growth or Rapid Growth
What does this population pyramid say about Nigeria?

8. Moderate Growth or Slow Growth
What does this population pyramid say about Brazil?

9. Low Growth or Zero Growth
What does this population pyramid say about the future of Japan?

10. Reasons why population changes?
Push Pull Factors
Push factors are those which force a person to move. This can include drought, famine, lack of jobs, over population and civil war.
Pull factors are those which encourage a person to move. These include a chance of a better job, better education, a better standard of living.

11. http://www. geographyalltheway

12. s

13. Vocabulary
Dependency ratio - number of people too young or too old to work compared to the number of people in their productive years Mortality – the number of deaths in a given area or period, or from a particular cause Fertility – the birthrate of a population Growth rates – the combination of birth rates, death rates and human migration. Life Expectancy – the average age that a person in a given population can expect to live to Replacement rate – the total fertility rate needed for a population to replace itself Refugee – a person who has been forced to leave their country in order to escape war, persecution, or natural disaster Immigration – the action of coming to live permanently in a foreign country Push-Pull Factors – factors that drive people away from a place and draw people to a new location Baby Boom – a sudden increase in the birth rate

14. Unit Questions and State Standards
What are the factors that impact the world’s populations?
What affects demographic make -up of places?
Why is population composition important to a place?
Why do people migrate?
How do governments affect population patterns?
How is population related to economic development?
MN State Geography Substrands and Standards
Substrand 2: People and Places
Standard 3 – Places have physical characteristics and human characteristics such as culture, population, political and economic systems.
Substrand 3: Human Systems
Standard 5 – The characteristics, distribution and migration of human populations on the earth’s surface influence human systems.