Game Smartz

Populations

Science

Populations Chapter Video

Populations Chapter Video

age structure

the number of males and females of different ages in a population
age structure Simple Definition

biodiversity

number and variety of species living in an area
biodiversity Simple Definition

carrying capacity

the largest population that an environment can support
carrying capacity Simple Definition

demographic transition

a population changing from high birth and death rates to low birth and death rates
demographic transition Simple Definition

demography

the study of human populations, their growth rate and distribution
demography Simple Definition

density dependent factor

a limiting factor that depends on the population size, for example, a large population needs more to hunt
density dependent factor Simple Definition

density independent factor

a factor that limits population growth independent of population size, for example a cold climate
density independent factor Simple Definition

emigration

a movement of individuals out of a population
emigration Simple Definition

exponential growth

a dramatic population increase in a short time
exponential growth Simple Definition

immigration

the movement of individuals into a population
immigration Simple Definition

keystone species

a species critical to the survival of an ecosystem
keystone species Simple Definition

limiting factor

an environmental factor that limits population growth, for example, a drought
limiting factor Simple Definition

logistic growth

when population growth starts slow, then sees exponential growth, then slows again
logistic growth Simple Definition

population

all the organisms of the same species living in the same area
population Simple Definition

population density

the number of individuals per unit of area
population density Simple Definition

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