Population Pyramids Flashcards
Population Pyramid
A graphical representation of a population’s age and gender structure, providing insights into birth rates, death rates, and overall demographic trends.
Age Cohort
A group of individuals in a population who share the same age range, typically represented on a population pyramid in five-year intervals.
Cohort
A group of individuals who share a common characteristic or experience, often used in population pyramids to represent age groups.
Dependency Ratio
The ratio of the economically dependent population (young and elderly) to the economically productive population (working-age), providing insights into the economic challenges a society might face.
Expansive Population Pyramid
A population pyramid with a broad base, indicating a high birth rate and a large proportion of young people. It often suggests a population with potential for future growth.
Constrictive Population Pyramid
A population pyramid with a narrow base, indicating a low birth rate and a smaller proportion of young people. It may suggest a declining population.
Stationary Population Pyramid
A population pyramid with relatively equal proportions across age groups, indicating a stable population with consistent birth and death rates.
Youthful Population Pyramid
A population pyramid with a significant youth population and a broad base, suggesting a high birth rate and potential for future growth.
Ageing Population Pyramid
A population pyramid with a higher proportion of elderly individuals, indicating a declining birth rate and longer life expectancy.
Population Momentum
The tendency for a population to continue growing despite a reduction in birth rates. This occurs due to the large number of individuals in the childbearing age group.
Rapid Growth Phase
The stage of a population pyramid characterized by a broad base, indicating a high birth rate and significant population growth potential.
Stable Growth Phase
The stage of a population pyramid where birth and death rates are more balanced, resulting in a steady and stable population growth.
Declining Growth Phase
The stage of a population pyramid characterized by a narrowing base, indicating a declining birth rate and potential population decline.
Baby Boom Generation
A demographic cohort born during a period of significantly increased birth rates, often following a war or economic prosperity.
Echo Boom Generation
A demographic cohort born to the Baby Boom generation, resulting in a “boom” or increased birth rate in the subsequent generation.
Sex Ratio
The ratio of males to females in a population, often expressed as the number of males per 100 females.
Population Inversion
A phenomenon where the elderly population of an area exceeds the number of younger individuals, leading to a top-heavy population pyramid.
Implications of Population Pyramids on Services
Population pyramids can inform the planning of services such as education, healthcare, and social welfare by highlighting the needs of specific age groups.
Demographic Dividend
The economic benefit that arises when a large proportion of a population is in the working-age group, contributing to economic growth.
Population Pyramids and Policy Planning
Governments and policymakers use population pyramids to develop strategies for healthcare, education, and social welfare, considering the age structure and demographic trends.
