Age Structure Diagrams - AP Environmental Science
- What type of population growth is indicated by a bulging middle in an age structure diagram?
- Past population boom. Historical period of high fertility.
- How are males and females typically represented in an age structure diagram?
- Males on left, females on right. Standard convention for population pyramids.
- What does a concave shape in an age structure diagram indicate?
- High mortality rates. Deaths reduce population at older ages.
- How does a high dependency ratio appear in an age structure diagram?
- Large base and top. Many dependents relative to working-age population.
- What does a constrictive shape in an age structure diagram indicate about a population's future?
- Potential decline. Narrow base predicts population shrinkage.
- How does an age structure diagram indicate a demographic dividend?
- Large working-age population. Optimal ratio of workers to dependents.
- Which age structure diagram shape indicates a country in the post-industrial stage?
- Rectangular or constrictive. Developed nations have low growth rates.
- Which age group is typically the largest in a rapidly growing population?
- Younger age group. High birth rates create large youth populations.
- In age structure diagrams, what does a tapering top suggest?
- High mortality in older age groups. Natural mortality increases with age.
- What does an age structure diagram with a bulging bottom half suggest?
- High birth rates. Many young people indicate recent fertility increases.
- What is the demographic implication of a large working-age population in an age structure diagram?
- Economic growth potential. Large workforce drives economic productivity.
- What does the width of bars in an age structure diagram represent?
- Population size of each age group. Bar width corresponds to cohort size.
- What does an age structure diagram represent?
- Distribution of a population by age and sex. Shows population composition visually by demographic groups.
- Identify the demographic trend depicted by an age structure diagram with a large youth population.
- Potential rapid growth. Large reproductive cohort enables future growth.
- Identify the age structure diagram shape for a country in the pre-industrial stage.
- Pyramid with wide base. High birth and death rates create pyramid.
- In which stage of demographic transition is a population with a pyramid-shaped age structure diagram?
- Stage 2: Early Expanding. High birth rates characterize early expansion.
- What does a narrow base in an age structure diagram indicate?
- Declining population. Few births means fewer young people.
- What does an age structure diagram with a uniform taper indicate?
- Balanced birth and death rates. Stable population with consistent vital rates.
- How can you identify a population undergoing demographic transition in an age structure diagram?
- Changes in shape over time. Demographic transition creates evolving population structure.
- What does an age structure diagram with a wide middle suggest about economic pressures?
- Higher economic demand. Large working-age population needs resources and jobs.
- What does an age structure diagram with a narrow youth section suggest about future workforce size?
- Shrinking workforce. Fewer young people mean smaller future workforce.
- Identify the typical shape of an age structure diagram for a declining population.
- Inverted pyramid. Top-heavy shape from low birth rates.
- What shape is an age structure diagram for a stable population?
- Rectangular. Equal birth and death rates create uniform width.
- Identify the age group most affected by high mortality, as shown in an age structure diagram.
- Older age groups. Mortality increases naturally with advancing age.
- What does a bulge in the middle of an age structure diagram suggest?
- Past high birth rates. Baby boom generation creates visible bulge.
- What does a broad top in an age structure diagram indicate?
- Large elderly population. Low mortality and fertility create aging populations.
- What does a tapering base in an age structure diagram suggest for future population size?
- Potential decline. Fewer births mean smaller future generations.
- What does a columnar age structure diagram indicate about birth and death rates?
- Low birth and death rates. Stable populations have balanced vital rates.
- Identify the demographic transition stage associated with a rectangular age structure diagram.
- Stage 4: Low Growth. Low growth characterizes developed nations.