"A population pyramid (age structure diagram) or 'age-sex pyramid' is a graphical illustration of the distribution of a population (typically that of a country or region of the world) by age groups and sex."
Graphical representations of age and sex structures of a population.
Demography: The study of population dynamics, including patterns of birth, death, and migration.
Age structure: The proportion of the population in different age groups, typically divided into broad categories such as 0-14, 15-64, and 65+.
Cohort: A group of people who share a common characteristic or experience, such as being born in the same year or decade.
Fertility rate: The number of live births per 1,000 women of reproductive age (typically ages 15-49).
Mortality rate: The number of deaths per 1,000 people in a particular population, often broken down by age and gender.
Life expectancy: The average number of years a person can expect to live, based on current mortality rates.
Dependency ratio: The ratio of non-working (dependent) population to working (productive) population, typically measured as the number of children and elderly people per 100 working-age adults.
Migration: The movement of people from one place to another, including both internal (within a country) and external (between countries) migration.
Urbanization: The process by which people move from rural areas to cities, leading to changes in population density and demographic composition.
Economic development: The degree to which a country or region has developed economically, often measured by factors such as income per capita and level of industrialization.
Gender: The social and cultural characteristics associated with being male or female, which can influence patterns of birth, death, and migration.
Health: The physical, mental, and social well-being of individuals and populations, which can be influenced by factors such as access to healthcare, sanitation, and nutrition.
Ethnicity and race: Categories of people who share common cultural or genetic traits, which can affect demographic patterns and experiences of discrimination or inequality.
Family structure: The composition and dynamics of households and families, including patterns of marriage, divorce, and childbearing.
Reproductive health: The ability of individuals and couples to achieve desired family size and spacing, which can be influenced by access to contraception and reproductive services.
Expansive population pyramid: This pyramid has a broad base and narrow top, indicating high birth rates and shorter life expectancy. This type of pyramid is common in developing countries.
Constrictive population pyramid: This pyramid has a narrower base and larger top, indicating low birth rates and longer life expectancy. This type of pyramid is common in developed countries.
Stationary population pyramid: This pyramid has roughly the same number of individuals in each age group, indicating a stable population. This type of pyramid is rare and found mostly in developed countries.
Inverted pyramid: This pyramid has a narrow base and wide top, indicating a declining population due to low birth rates and high life expectancy. This type of pyramid is common in countries with aging populations.
Rectangular pyramid: This pyramid has roughly the same number of individuals in all age groups, indicating a stable population. This type of pyramid is found in developed countries with low birth rates and low mortality rates.
Zigzag pyramid: This pyramid has a jagged shape, indicating high levels of migration, as well as variations in birth and death rates. This type of pyramid is common in countries experiencing rapid social and economic changes.
Diamond-shaped pyramid: This pyramid has a narrow base, broad middle, and narrow top, indicating a declining population due to decreased birth rates and migration. This type of pyramid is common in countries experiencing economic and social change.
Hourglass pyramid: This pyramid has a narrow base, broad middle, and narrow top, indicating a declining population due to decreased birth rates and increased mortality rates. This type of pyramid is common in countries experiencing economic and social change, as well as in countries with a high prevalence of HIV/AIDS.
"It represents the distribution of a population by age groups and sex."
"It typically takes the shape of a pyramid when the population is growing."
"Males are usually shown on the left..."
"...and females on the right."
"They may be measured in absolute numbers or as a percentage of the total population."
"The pyramid can be used to visualize the age of a particular population."
"It is also used in ecology to determine the overall age distribution of a population..."
"...an indication of the reproductive capabilities and likelihood of the continuation of a species."
"Number of people per unit area of land is called population density."
"An indication of the reproductive capabilities..."
"Number of people per unit area of land is called population density."
"The shape of a population pyramid is influenced by the age and sex distribution of the population."
"It typically takes the shape of a pyramid when the population is growing."
"Males are usually shown on the left and females on the right."
"The pyramid can be used to visualize the age of a particular population."
"Yes, it can determine the likelihood of the continuation of a species."
"The population pyramid also illustrates the distribution of a population by age groups and sex."
"Yes, population pyramids can be used to compare the age structure of different populations."
"The x-axis of a population pyramid represents the age groups of the population."