Chapter 3 Section 2
Population Patterns
ESSENTIAL QUESTIONS?????
Define the following terms:
1. Death rate
2. Birth rate
3. Famine
4. Population density
5. Urbanization
6. Emigrate
7. Refugee
1. What are 3 problems caused by
overpopulation?
2. Why do people live on only a small fraction
of the earth?
3. What is the main reason for urbanization?
4. What is the difference between an emigrant
and an immigrant?
5. Why have populations in the areas of Asia,
Africa and Latin America doubled about
every 25 years?
October 12, 1999
- World Population reaches 6 billion
- 370, 000 babies born that day around the world
- World Population Clock
Population Growth
- Graph page 88
- For more than 1500 years the world’s population
remained the same
- 1 billion people – 1800
- 2 billion people – 1930
- 4 billion people – 1970
- 6 billion people - 1999
- 6.75 billion – 2007
Reasons for Population Growth
- Death Rate has gone down
o Number of people per 1000 that die each year
 Better health care
 Better living conditions
 More abundant food supply
- High Birth Rate
o Number of babies born per 1000 each year
 Especially true in countries in Asia,
Africa and Latin America
 Large families necessary to do the
work on farms by hand
 Populations in these areas have
doubled every 25 years
Population Pyramids- state, national, country
Challenges From Population Growth
- More food is needed
o Food production has continued to increase
faster than the population since the 1950s
except in Africa
 Many suffer from famine – starvation
 Caused by bad weather, war or
natural disasters
 Hunger Facts: International
 The world hunger problem: Facts,
figures and statistics
- More resources are being used up
o Water
o Petroleum
- Not enough jobs for people
o Strain on the economy
- Some believe that the rapid population growth will
hurt the planet
o Others believe that technology will “save the
day”
Where People Live
- The world’s population lives on a surprisingly small
part of the planet
o Land covers only 30 percent of the surface of
the earth
 ½ of the land is not useable
 ice covered
 deserts
 high mountains
- Population Distribution
o The earth’s population is not evenly distributed
(spread out)
o People live where there is plentiful water, good
land, and favorable climate
o During the industrial age people moved to
areas that had abundant resources
 Coal
 Iron
 Make and run machines
o People gather in other places for religious
reasons
o People live near government and transportation
centers
o Chart on page 88
 Most populated countries in the world
 Four of these countries are in Asia

- Population Density
-
o How crowded a country/area is
o The average number of people per square mile
 Total population divided by the total land
area
 Bolivia – Dominican Republic
o Similar populations
o DR has a population density of
443 people per square mile
because it is smaller
 Nepal – Afghanistan
o Similar populations
o Afghanistan is larger and so has
a population density of only 114
people per square mile.
 *** population density is only an
average – it would assume that all of
the people in an area are spread out
equally.*****
o SD population density
 80,000 square miles
 800,000 people
 10 people per square mile
 Sioux Falls?SF Data
 Lake Andes?LA Data
 Pickstown?Picks Data
o Egypt
 182 people per square mile
 99 percent of Egypt’s
population live within 20
miles of the Nile River
 population density is
6995 per square mile
 The rest of the country has
very few people in it
 Desert and unusable
land
Population Movement
- Throughout the world large numbers of people are
moving every day
o City to city
o Rural to urban – known as urbanization
o Urban to rural
o Villages to farms
o Farms to villages
- People move to the cities for many reasons
o To find jobs
o Not enough land for people to make a living by
farming
 People find jobs in manufacturing or
tourism
- Nearly ½ of the world’s population live in cities
o Much higher than ever before
o 1960 – 2000
 population of Mexico City tripled
 Other Latin American cities, as well as
African and Asian cities experience
similar growth.
 Some cities hold most of their country’s
population
 Buenos Aires Argentina
o Home to 1/3 of Argentina’s
population
 Cities grow very rapidly
 Known as urban sprawl
o Some population movement occurs between
countries
 Many people emigrate – leave one
country and move to another
 People moving into a new country to
become its citizens – immigrants
 Past 40 years
 Millions have left Africa, Asia and
Latin America to find jobs in richer
nations in Europe and NA
 Many people are forced to flee because of
wars, political unrest, food shortages or
other problems
 Known as refugees – picture page 90
-
o People who flee one country to
another to escape persecution or
disaster.
Section 2 Assessment pg 92