Chapter 4, Section 2

POPULATION GEOGRAPHY

OBJECTIVESTo explain the factors involved in the world’s

population growth.To describe the distribution of the world’s

populationTo describe factors that influence population

density and carrying capacity

Worldwide Population Growth

Question: does the world already have too many people? Can it support more? If so, where? Which people?

2008 = 6.6 Billion people (according to Wikipedia)

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Population Geography Analysis Population Geographer - studies aspects affecting

population

Birthrate: number of live births per thousand population

according to World Population : Congo is highest with 49.6 per 1000 and Singapore is lowest with 8.2 per 1000

Fertility Rate: average number of children per woman during childbearing years throughout lifetime

according to CIA worldbook factbook: Mali is highest with 7.34 and Singapore is lowest with 1.08

--replacement rate: number of children each mother must have to maintain current population --estimated is 2.1 WHY might this figure be misleading? Is it more appropriate to analyze country levels rather than world?

Population Geography Analysis

Mortality Rate: number of deaths per thousand (also called the death rate)QUESTION--What would be an ideal or healthy mortality rate?

Infant Mortality Rate: number of deaths among infants under age one per thousand live birthsQUESTION--What nations might you assume have a high infant mortality rate? Why? Low rate? Why? What factors affect this?

according to the CIA Worldfact book the US has 6.3 per one thousand, ranking number 181--behind Cuba, most of Europe, South Korea, Japan, and Singapore…is this surprising? Why or why not?

Other rates studied: perinatal mortality, maternal mortality, child mortality, standardized mortality rate

Population Geography Analysis

Rate of natural increase: also known as the growth rate. Subtract mortality rate from the birth rate

According to the CIA Wolrdfact book the US birth rate is appx. 14 per 1000 and the death rate is 8 per 1000.

Rate of increase = Birth rate - Death rate = 14 - 8 = 6 per thousand

Population Pyramid A graphic device that shows sex and age

distribution.

See page 79What does a higher elderly age rate mean for

a community or society? Young age? What is most ideal?

Population Distribution

Habitable Lands 90% of people live in Northern Hemisphere Lands between 20 degrees and 60 degrees N latitude have

very suitable climate and vegetation conditions = more dense human population

High population density in coastal regions and river valleys Lower population density in polar regions, heavily

mountainous regions, desert regions More than 1/2 of world’s population lives in rural areas, but

dramatically changing Largest city in world = city (proper) = Mumbai, India at 13

million Let’s look at map on page 80QUESTION: What affect does a higher urban population have

on society, nations, the world?

Population DistributionMigration

1.Push factors - factors causing people to leave homeland and migrate to another region

Environmental conditionsWarNatural disastersPersecution

2.Pull factors - factors that draw or attract people to another location

Good economyHigh salaryClimate

Population DensityPop. Den. Is the average number of people who live in a

measurable area (such as square mile or kilometer)

How to calculate?

Total number of inhabitants/total amount of land

New Jersey has density of app. 1000 people per square mile and Australia has density of app. 6 people per square mile…what is misleading about these figures?

Carrying Capacity: the number of organisms a piece of land can support

QUESTION--What factors can increase carrying capacity?

REVISIT OUR GOALS

Can you: Explain the factors involved in the world’s

population growth Describe the distribution of the world’s

population Describe some factors that influence

population density and carrying capacity

Population Pyramid Assessment

Students will select a country (the country of your choice more specifically), find data and draw a population pyramid. You may not trace, photocopy, whatever, whatever. This is to assess your knowledge and ability to gather information and formulate a graphic device. It must be of data from no earlier than 2006. Use page 79 as a guide. The pyramid should be neat, clean, organized, accurate. Use color as shown.

Due Monday October 20!!! See rubric on-line