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Chapter 4 Human Population Growth

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The countries in Africa, Asia, and Latin America have the ... About 45 countries as Europe, North America, Japan, New Zealand, Australia. Developing country ... – PowerPoint PPT presentation

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Title: Chapter 4 Human Population Growth


1
Chapter 4 Human Population Growth
  • Describe world population changes and trends
  • Explain how population changes occur
  • Distinguish between developed and developing
    nations, including population trends
  • Describe the role of population control

2
Terms
  • Birth rate
  • Death rate
  • Demography
  • Developed country
  • Developing country
  • Fertility rate
  • Life expectancy
  • Migration
  • Natural population change
  • Population
  • Population control
  • Replacement fertility rate
  • Total fertility rate
  • Zero population growth

3
Population
  • Is the number of people in a location

4
Current Population
  • The world has a population of 5.6 billion people
  • It is increasing at the rate 3 per 254,000 per
    day or 1.7 a year
  • Worldwide increases have been most rapid since
    1950
  • Better health care and improved nutrition help
    people live longer
  • Fewer infants and small children are dying before
    adulthood
  • Expected to decline after about the year 2050 as
    developing countries improve living conditions

5
Demography
  • Demography is the science of human population
  • Common demographic information includes age,
    gender, income, race, and education
  • The countries in Africa, Asia, and Latin America
    have the highest population growth
  • Europe and North America have the lowest
    population growth
  • The worlds population will double by 2030 or at
    least by 2050

6
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7
Population Change
  • Natural change
  • Birth and death rate
  • Population declines
  • Migration
  • Opportunity for prosperity
  • Rural to urban migration

8
Birth and Death Rates
  • The birth rate (fertility rate) is the average
    number of births per 1,000 people per year
  • The death rate (mortality rate) is the average
    number of deaths per 1,000 people per year
  • Currently, each minute in the world, 270 babies
    are born and 90 people die, population increases
    180 people a minute

9
Population Declines
  • Occur when the birth rate is not adequate to
    maintain the population
  • Migration and death rate exceeds the birth rate
    and immigration
  • Europe, Russia and Ukraine also have decline
    population
  • The death rate declines because of
  • Development in disease control and treatment
  • Food and nutrition are important
  • Prevent accidents and injuries

10
Migration
  • Opportunity for prosperity
  • Seeking new opportunity and occupation
  • Rural to urban migration
  • Problems related to quality of life

11
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12
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13
Extent of Development
  • Developed country
  • Is industrialized
  • Higher income
  • Fewer needed in farming
  • Science and technology is high
  • About 45 countries as Europe, North America,
    Japan, New Zealand, Australia
  • Developing country
  • Is not industrialized
  • Low income and poor
  • Based on subsistence farming
  • Few job in business and industries
  • About 125 countries in Africa, Latin America,
    Asia, Caribbean, Oceania

14
Contrasting Birth Rate
  • Developed countries
  • Japan 10 babies/1,000 people a year
  • USA 9/1,000
  • Developing countries
  • Pakistan 45/1,000
  • China 21/1,000

15
Fertility Rate
  • Replacement fertility rate
  • Indicates the number of children needed to
    replace those who die
  • Important measure of the ability of a population
    to maintain itself
  • Developed countries, RFR is about 2.1 babies per
    female
  • Developing countries is 2.5 babies per female
  • Total fertility rate
  • Is the average number of children a woman will
    have
  • TFR for the world is currently 3.3 babies per
    female
  • Developed countries 1.9
  • Developing countries 3.7

16
Life Expectancy
  • Is the number of years that a newborn baby may be
    expect to live
  • All countries average 66 years
  • Developed countries 75 years
  • Developing countries 63 years
  • Japan 79 years
  • Sierra Leone 43 years

17
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18
Population Control
  • How many people can the resources of the world
    support?
  • Population control is reducing the rate of
    population increase
  • Zero population growth reflects a birth rate
    equal to the death rate

19
Acceptance of Population Control
  • The past
  • Large families because children could help the
    work
  • Children could care in later years
  • The present
  • Small families
  • Prepare for their live as older adults
  • Fertility rates declines as educational levels
    increase

20
Tests
  • How is the worlds population predicted to change
    in the next 50 years?
  • How do natural population changes influence world
    population? Contrast natural changes with changes
    caused by migration.
  • What are the major differences in population
    trends between the industrialized and developing
    countries?
  • How can population growth be controlled?
  • Do you feel that some from of limitation on
    births is desirable? Why?
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