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Sec 2 - Introduction To Population Part I
 

Sec 2 - Introduction To Population Part I

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  • Worksheet: The worksheet A Growing Population accompanies this slide.
  • Teacher’s notes: For an up-to-date list of the world population, please visit: http://www.census.gov/main/www/popclock.html. The most populated continent is Asia. In 1999, Asia accounted for 60% of the world’s population. Asia was followed by Africa on 12.8% and Europe on 12.2%. (South America had 8.5%, North America 5.1% and Oceania 0.5%) Boardworks Ltd cannot take responsibility for external websites. Photo credit: ©2008 http://www.sxc.hu/
  • Photo credit : ©2008 http://www.sxc.hu/ (Beach) Photo credit: ©2008 Jupiter Images Corporation (Hong Kong)
  • Teacher’s note: Having a high birth rate will result in more babies being born within the country. Having a low death rate will result in people staying alive for longer. If a country’s birth rate rises or its death rate falls, there is a good chance that the population will increase. If a country has a birth rate that is rising and a death rate that is falling, the population will definitely increase. If more countries are developing medically, then their death rates will fall as their health care improves. There is also a chance that the birth rate will rise as the medical advances will allow ill babies to be kept alive for longer. Photo credit: ©2008 http://www.sxc.hu/
  • Teacher’s note: The terms birth rate, death rate and natural increase are further defined on slide 15. Photo credit: ©2008 Jupiter Images Corporation
  • Teacher’s note: The terms birth rate, death rate and natural increase are further defined on slide 15. Photo credit: ©2008 Jupiter Images Corporation
  • Photo credits: ©2008 http://www.sxc.hu/
  • Teacher’s note: Typically, LEDCs have faster growing populations than MEDCs. This is because the birth rates of LEDCs tend to be so much higher than the death rates. This is due to many reasons: a lack of medical contraception, a tradition for large families, the need for children to support the family, etc. Worksheet: The worksheet MEDCs and LEDCs accompanies this slide. Photo credits: ©2008 Jupiter Images Corporation
  • Teacher’s note: This population pyramid has quite a wide base. There is a very rapid narrowing of the sides of the pyramid and there is a very small percentage of the population who live to an old age. There appears to be a pronounced difference between the number of females and males surviving in this country. This could be due to ongoing wars. This is a population pyramid for an LEDC.

Sec 2 - Introduction To Population Part I Sec 2 - Introduction To Population Part I Presentation Transcript

  • Population Part I Workbook Pg 5 & 6
  • World population changes
  • What causes population to increase?
    • Improvements in the general standard of living.
  • Standard of living
    • Defined as living conditions
    • Access to education, health care & basic amenities (clean toilet, clean water)
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  • What causes population to increase?
    • Improvement in the standard of medical care.
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  • What causes population to increase?
    • Increased in food production
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  • What causes population to increase?
    • Increase in the demand for industrial labour (industrialization)
      • More jobs created
      • Increase income to have better lives
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  • World growth
    • The world population is increasing rapidly.
    • Every second five people are born and two people die.
    • That is a gain of three people per second!
    The world population is the total number of humans alive on the planet Earth at a given time. What is the current world population? In which continent do most people live?
  • How popular? A country’s population refers to the total number of people that are living there. China is the most populated country in the world. There are over 1.3 billion people living there. With a population of just over 11,000 , Tuvalu is one of the least populated countries in the world. What do you think the population of Singapore is?
  • The only way is up This population explosion has been caused by a number of different factors.
    • Developing countries have higher birth rates .
    • Death rates have fallen in well-developed countries due to advances in medical science.
    • The number of countries that are economically sound and well-developed has risen over the past 100 years.
    How might these different factors have affected the world’s population?
  • Life and death
    • The number of babies being born in a country each year is the birth rate .
    • The number of people who die in a country each year is the death rate .
    • These rates are measured for each 1000 of the population.
    A country’s birth rate is 10. This means that 10 people are born for every 1000 of the population per year. If the country’s population was 10,000 then there would be 100 extra people in the country after one year. What do we mean when we talk about birth and death rates?
  • Natural increase The data from the birth and death rates can be used to work out the natural increase in a country’s population. Natural Increase = Birth rate - Death rate
    • If it is a positive number, the country’s population is increasing .
    • If it is a negative number, the country’s population is decreasing .
    High birth rates combined with longer life expectancy have contributed towards the world population explosion.
  • Extra
    • Infant mortality rate
      • The number of deaths among infants under one year of age for every 1000 live birth per year.
  • MEDCs and LEDCs
    • Countries with a lot of money are called M ore E conomically D eveloped C ountries ( MEDC s).
      • Developed countries
    The level of development of the country can impact on how quickly its population is rising.
    • Countries with less money are called L ess E conomically D eveloped C ountries ( LEDC s).
      • Less Developed countries
  • What’s the difference? A More Economically Developed Country (MEDC) usually has:
    • a high birth rate
    • a higher death rate than MEDCs
    • a large natural increase.
    • a low birth rate
    • a low death rate
    • a small natural increase.
    Less Economically Developed Countries (LEDCs) tend to have: Which type of country do you think has the faster growing population?
  • Population structure MEDCs and LEDCs usually have differently structured populations due to differences in their birth and death rates. This shows the total population of males and females in different age ranges. The population structure of a country is usually drawn on a graph called a population pyramid . How would you describe the structure of this population pyramid?