Population

• Study of population is called demography
• Population density: average number of people living in a square kilometre
• Factors affecting population density:

  1. climate
  2. relief
  3. manufacturing
  4. urban areas
• Population pyramids tell us

  • number of people in different age groups
  • life expectancy
  • number of females and males
  • economic development
• Types of population pyramids

  1. expanding
  2. stationary
  3. contracting
• Population explosion: rapid growth in population
• Birth rate: number of births per 1000 people in a year
• Death rate: number of deaths per 1000 in a year
• Population distribution: how people are spread out in an area
• Migration: moving from one place to another within a country
• Emigration: Moving from Ireland to another country
• Immigration: moving from other countries to Ireland
• Asylum seekers: people who apply for refugee status
• Infant mortality rate: number of children under 1 who die per 1000 born
• Fertility rate: average number of Children born per mother
• Tanzania

  • developing country
  • expanding population
  • life expectancy= 62
• Ireland

  • developed country
  • stationary population
  • life expectancy= 80
• Economically dependant: 0-14 and 65+
• Economically active: 15-64