Chapter 8: Population Flashcards
Exponential Growth
when the growth rate of a population increases rapidly over time
Population
All the organisms of one species living in a defined area
Lag phase
The period of time in population growth when an organism is adapting to its new environment and growth is slow
Log Growth
When the growth rate of a population increases rapidly over time
Stationary phase
When the growth of a population has slowed to zero
Carrying capacity
the maximum size of a population over an environment can support in terms of food, water, and other resources
birth rate
the total number of live births over time
death rate
the total number of deaths over time
rate of natural increase
The birth rate minus the death rate. Usually calculated as a percentage
Migration
The movement of people into (immigration) or out of (emigration) a region, country, or other area
Push/Pull factors
Density
The number of people living in a population in a defined area
density = population/land area
Distribution
Where populations of people either do or do not live
Population pyramid
a diagram that shows the proportion of the population that is male and female in different age groups (usually 5 year intervals)
Age pyramid
a diagram that shows the proportion of the population that is male AND/OR female in different age groups (usually 5 year intervals)
