AP Human Geography / Unit 2: Population and Migration Patterns and Processes
2.4 Population Dynamics
Notes
- CBR and CDR (per 1,000). Rate of natural increase = (CBR − CDR) ÷ 10 (%).
- Doubling time ≈ 70 ÷ growth rate.
- TFR, infant mortality rate, life expectancy.
Practice
CBR 30, CDR 10. Rate of natural increase:
$(30-10)\div10$.
At 2% growth, doubling time is about:
Rule of 70.
Infant mortality rate measures:
A development indicator.
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