Revise later
SpaceTo flip
If confident
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 are the potential consequences of a rapidly growing population (wide-based pyramid)?
Strain on resources, high unemployment, overcrowding, pressure on education/healthcare.
What are the potential benefits of a stable population (column-shaped diagram)?
More stable workforce, better social security system, predictable economic growth.
How would decreased birth rates shift a pyramid-shaped age structure?
Shift towards a column or inverted pyramid shape by reducing the size of the pre-reproductive group.
How would increased death rates shift a pyramid-shaped age structure?
Shift towards a column or inverted pyramid shape by reducing the size of reproductive and post-reproductive groups.
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.