AP Human Geography / Unit 2: Population and Migration Patterns and Processes
2.3 Population Composition
Notes
Population pyramids show age and sex structure.
- Wide base: young, growing. Narrow base: aging, slow or negative growth.
- Dependency ratio: people under 15 and over 64 compared with working-age people.
Practice
A population pyramid with a wide base indicates:
Many children.
The dependency ratio compares:
Who supports whom.
A bulge in males aged 20–40 in a Gulf state likely comes from:
Labor migration.
Ready for more? Take the Unit 2 test.