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creative vocab
robin's homework
15
Science
7th Grade
09/23/2011

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Cards

Term
organism
Definition
a living thing.
Term
habitat
Definition
an enviroment that provides an organism what it needs to survive.
Term
abiotic factor
Definition
a nonliving part of an organisms habitat
Term
species
Definition
a group of organisms that are physically similar and can mate with on another
Term
death rate
Definition
number of deaths in a population in a certian amount of time
Term
population density
Definition
the number of individuals in an area of specific size
Term
carrying capacity
Definition
the largest population an area support
Term
limiting factor
Definition
an enviromental factor that causes the population to decrease
Term
natural selection
Definition
a process by which characteristics that make an individual better suited to its enviroment become more common in species
Term
adaption
Definition
a behaveior or physical characteristic that allows an organism to live successfully in its environment
Term
niche
Definition
the role of an organism in its habitat
Term
parasitism
Definition
a relationship in which one organism benifits while harming another
Term
primary sucession
Definition
the series of changes that occur in an area where no soil or organisms exist
Term
secondary succession
Definition
the series of changes that occur in an area where the ecosystem has been disturbed, but where soil and organism exist
Term
mutualism
Definition
a relationship between two species when both benifit
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