Unit 3 Flashcards
Age distribution
The portion of people that are in different age groups (in certain population )
Age structure
Age distribution in certain population
Age structure pyramid
A graph used to demonstrate a populations growth
Birth control pill
A pill used by women to level hormones and prevent pregnancies
China one child policy
Limits the number of children in families to stop population growths in china
Contraceptives
Medical or physical preventatives to stop pregnancies
Crude birth rate
The number of births per 1000 people per year
Crude death rate
Number of deaths per 1000 individuals in a year
Demographic transition
A social, cultural, or economic change
Demography
The study of statistical changes in human population
Doubling time
The amount of time it will take to double a population
Biotic potential
The max rate a population can reproduce in ideal conditions
Birth rate
Number of live births per 1000 people
Carrying capacity
The max population size an environment sustain based on a number of factors
Death rate
Total number of deans in population per 1000 people
Density dependent factors
A factor that affects a population based on population density
Density independent factors
Factors that is independent to a populations density and will affect its survival all the same
Emigration
Leaving a country
Exponential growth
Growth that starts slowly then grows quicker as population increases
Extinction
Where every single member of a species is gone :(
Generalists
Animals who survive in numerous conditions w/ large range diet
Growth rates
Now a population changes in size
Immigration
Going/coming to a new country
Industrial stage
Population growth slows and stabilizes (stage 3, demography transition)
