1. Population Growth and Distribution

2. Population Growth Around 7 billion people now live on Earth Demography
Using about 30% of the planet’s land
Demography
The study of populations
Demographers believe the population will reach 7.8 billion in the year 2025

3. Population Growth
Modern Technology and Medical Care are factors that have changed population growth
These factors have helped in increasing birthrates and decreasing death rates in many countries

4. Population Growth Birthrate Death Rate Natural Increase
The number of births per year for every 1,000 people
Ex: United States birthrate is 14
Death Rate
The number of deaths per year for every 1,000 people
Ex: United States death rate is 8
Natural Increase
Also known as growth rate
Difference between an area’s birthrate and death rate

5. Natural Increase Map

6. Population Distribution
Population distribution is the pattern of human settlement
Only about 30% of the Earth is made up of land
Only 10% of that land is livable
Population Density
The average number of people in a square mile or square kilometer.
Two categories go into calculating population density
Land Area
Population of that area
To calculate, the population is divided by the land area
Ex: US population- 295,700,000
= 79.5 people per sq. mi.
US Land area- 3,717,796

7. Migration Migration is the movement of people from place to place
Immigration
People coming into a country
Emigration
People leaving a country
These factors as well help determine an area’s population growth

8. Immigration

9. Population Density by Country
Land Area
(sq mi)
Population
Population Density
(people per sq mi)
Ethiopia
426,371
73,100,000
171.4
India
1,269,340
1,080,300,000
851.1
Germany
137,830
82,400,000
597.8
United States
3,717,796
295,700,000
79.5

10. Population Density by Country
Land Area
(sq mi)
Population
Population Density
(people per sq mi)
Ethiopia
426,371
73,100,000
171.4
India
1,269,340
1,080,300,000
851.1
Germany
137,830
82,400,000
597.8
United States
3,717,796
295,700,000
79.5

11. Population Density by Country
Land Area
(sq mi)
Population
Population Density
(people per sq mi)
Ethiopia
426,371
73,100,000
171.4
India
1,269,340
1,080,300,000
851.1
Germany
137,830
82,400,000
597.8
United States
3,717,796
295,700,000
79.5

12. Population Density by Country
Land Area
(sq mi)
Population
Population Density
(people per sq mi)
Ethiopia
426,371
73,100,000
171.4
India
1,269,340
1,080,300,000
851.1
Germany
137,830
82,400,000
597.8
United States
3,717,796
295,700,000
79.5

13. Population Density by Country
Land Area
(sq mi)
Population
Population Density
(people per sq mi)
Ethiopia
426,371
73,100,000
171.4
India
1,269,340
1,080,300,000
851.1
Germany
137,830
82,400,000
597.8
United States
3,717,796
295,700,000
79.5

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