Unit 3 Human Population
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Biotic Potential
The maximum capacity of a species to grow under ideal conditions
Net Growth Rate (r)
The change in population size over time, as a percentage
Doubling Time (dt)
The time it takes for a population to double in size (Rule of 70)
Crude Birth Rate (CBR)
Number of births per 1,000 people per year
Crude Death Rate (CDR)
Number of deaths per 1,000 people per year
Population Growth Rate (PGR)
Overall population change
Rate of Natural Increase (RNI)
Population increase from births - deaths
Replacement-Level Fertility (RLF)
Number of children needed per couple to keep population constant
Total Fertility Rate (TFR)
Average number of children a woman has over her lifetime
Life Expectancy
Average lifespan of individuals in a population
Infant Mortality Rate
Number of infant deaths per 1,000 live births
Carrying Capacity
Maximum population size that an environment can support long-term
Population Momentum
Continued population growth even after birth rates decline due to a high number of individuals in childbearing years