population pyramids Flashcards
what is a population pyramid
a graph that shows the distribution of ages across a population divided down the centre between male and female members of the population
what are the 3 main population pyramids
expanding, contracting, stationary
characteristics of an expansive population pyramid?
broader at the base, thinner at the top (pyramid shaped)
characteristics of a constrictive population pyramid
constricted at the bottom, wider in the middle
characteristics of a stationary population pyramid
square shape, not much variation across ages
what is typically associated with an expansive population pyramid
a rapidly growing area with high fertility and mortality rates (developing countries) with the largest proportion of the population consisting of young people
challenges and opportunities of an area with an expansive population pyramid
challenges:
- strain on resources
- hard to ensure sufficient food
- lower access to education and employment opportunities
opportunities
- favourable ratio of large proportion of young workforce to dependents
what is typically associated with a constrictive population pyramid
an area with high levels of social and economic development and high numbers of middle aged and elderly people but fewer young people (developed countries)
challenges and opportunities of an area with a constrictive population pyramid
challenges:
- ageing population may strain healthcare system
- may not have enough workers and become dependent on migrant workers
opportunities:
- increasing retirement age to allow elderly workers to continue working if they wish to
what is associated with a stationary population pyramid
population with low mortality and fertility rates, but have a stable population that will not change significantly
challenges and opportunities of areas with stationary population pyramid
challenges:
- declining birth rates
opportunities:
- unchanging pattern of fertility and mortality diminishes issues of overcrowding and congestion
- sufficient resources for everyone
countries typically associated with expansive population pyramid
developing counties like india, countries in africa, the middle east (chad, congo etc)
countries typically associated with constrictive population pyramid
developed countries like some asian countries (singapore, japan, south korea) and european countries (germany)
countries typically associated with stationary population pyramid
usa