Population

Population

1. How and why the world's population has grown.

   • 1849: Snow suggests a link with contaminated water and cholera so he promotes an investment in a clean water supply for the UK.
   • 1955: Salk develops the first polio vaccine.
   • 1981: First case of Aids in the United States.
   • 2004: Asian Tsunami kills over 230,000 people.
   • 1786: Small Pox vaccination was developed by Jenner.
   • 1883: Factory Act in the UK makes employing children under 9 illegal.

2. Key terms

   • Natural Increase: When a population grows due to more births than deaths.
   • Death Rate: The number of deaths in a country per 1000.
   • Birth Rate: The number of babies born in a country per 100.

3. GIS

   • Advantages: combines information. Finds information quickly. Maps/graphs information instantly.
   • Geographic. Information. System.
   • An appropriate GIS tool would be the NINIS website as it provides a range of statistical data from the 2001 census.
   • Interactive maps are also available e.g. maps include information such as a country of birth, ethnic group and community background.
   • Digital graphs can also be constructed using a computer package such as Excel.

4. Reasons for increases and decreases in LEDC and MEDC countries

   • Increased birth rate, LEDC:
     • No contraception.
     • Children are an economic necsity.
     • To replace the children who didn't survive.
     • Wealth is measured in the number of children you have.
   • Increased death rate, LEDC:
     • Famine and drought.
     • Poor health care.
     • Diseases such as cholera and malaria are common.
     • High levels of maternal death.
   • Decreased birth rate, MEDC:
     • Contraception.
     • More focus on work.
     • Children are an economic burden.
   • Decreased death rate, LEDC:
     • Good healthcare, NHS.
     • Good diets.
     • Low maternal death.