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L01 2010 the growth of world population
 

L01 2010 the growth of world population

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    L01 2010 the growth of world population L01 2010 the growth of world population Presentation Transcript

    • The Growth of World Population
    • Key Terms
      Population Distribution – How people are spread across the earth.
      Population Density – The number of people living in a given area. Usually measured as people per square kilometre.
    • Key Terms
      Birth Rate - A measure of an area’s fertility. It is expressed as number of live births per 1,000 people in 1 year. (Crude Birth Rate)
      Death Rate – The number of deaths per 1,000 people in 1 year. (Crude Death Rate)
      Life Expectancy – The average number of years from birth that a person can expect to live.
    • Key Terms (con’t)
      Longevity – the increase in life expectancy over a period of time. It is a direct result of improved medical provision and increased levels of economic development. People live longer and this creates an older population.
    • Key Terms (con’t)
      Natural Change – The change in size of a population caused by the interrelationship between birth and death rates. If birth rate exceeds death rate, a population will increase.
      If death rate exceeds birth rate, a population will decline.
    • Global Population
      Growth in World population has not taken place evenly.
    • World Population Growth
    • Population Change
      Components of Population Change:
      Fertility (births)
      Mortality (deaths)
      Migration
    • Measures of Fertility
      Crude Birth Rate (CBR)
      Total Fertility Rate – the average number of children born to a women during her lifetime.
      Replacement Level Fertility –the level at which each generation has only enough daughters to replace themselves. Approximately 2.12 is replacement rate.
    • Measures of Mortality
      Crude Death Rate
      Age-Specific Death Rate
      Age- and Sex- Specific Death Rate
      Infant Mortality Rate (IMR) – a measure of the number of deaths of infants before their first birthday per 1000 live births.
      Life Expectancy – the average number of years a person can expect to live.
      Maternal Mortality Rate – the number of women who die as a result of complications in pregnancy and childbirth. Measured per 1000 live births in a year.
    • Causes of Population Growth
    • Factors: Health
      Control of Disease
      Birth Control Measures
      Infant Mortality Rates
      Diet and Malnutrition
      Numbers of Doctors and Nurses
      Sexual Health
      Sanitation
    • Factors: Education
      Health Education
      Age at Which Compulsory Schooling Finishes
      Females in Education
      Levels of Tertiary Education
      Literacy Levels
    • Factors: Social Provision
      Levels of care for the elderly.
      Availability of radio and other media.
      Clean water supply.
    • Factors: Cultural Factors
      Religious attitudes to birth control
      Status gain from having children.
      Role of women in society.
      Sexual morality.
    • Factors: Political Factors
      Taxation to support services
      Strength of the economy
      Impact of war and conflicts
      Access to healthcare and contraception.
    • Factors: Environmental Factors
      Frequency of hazards.
      Environmental conditions that breed disease.