All Flashcards
What is an age structure diagram?
Graphical representation of population distribution by age groups and sex.
Define pre-reproductive age category.
Age group 0-14 years old.
Define reproductive age category.
Age group 15-44 years old.
Define post-reproductive age category.
Age group 45+ years old.
What does a pyramid-shaped age structure diagram indicate?
Rapid population growth due to many young people entering reproductive years.
What does a column-shaped age structure diagram indicate?
Stable population growth with similar numbers in each age group.
What does an inverted pyramid-shaped age structure diagram indicate?
Declining population with fewer young people than older people.
How do age structure diagrams help predict future population trends?
By showing the proportion of people in pre-reproductive, reproductive, and post-reproductive age groups.
What societal factors can influence the shape of an age structure diagram?
Birth rates, death rates, access to healthcare, and family planning.
How do birth and death rates relate to age structure?
High birth rates create wide base; high death rates shorten bars, especially in older groups.
How can age structure diagrams reflect environmental conditions?
They show impacts of resource availability and environmental stressors on population health and survival.
What does a pyramid-shaped age structure diagram indicate?
Rapid population growth due to many young people entering reproductive years.
What does a column-shaped age structure diagram indicate?
Stable population growth with similar numbers in each age group.
What does an inverted pyramid-shaped age structure diagram indicate?
Declining population with fewer young people than older people.
Why are age structure diagrams useful?
Essential for predicting future population trends and understanding societal impacts.
How do birth and death rates relate to age structure?
Diagram shapes reflect the influence of birth and death rates on population growth.
What does a wide base in an age structure diagram signify?
A high proportion of young individuals, indicating a rapidly growing population.