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7th grade science vocabulary.


the relation between two different species of organisms that are interdependent


movement of individuals into an area occupied by an existing population


movement of individuals out of a population


any animal that lives by preying on other animals


animal hunted or caught for food


an interaction in which one organism captures and feeds on another organism

Birth Rate

the ratio of live births in an area to the population of that area

Death Rate

the ratio of deaths in an area to the population of that area

Population Density

number of individuals per unit area

Carrying Capacity

largest number of individuals of a population that a environment can support

Limiting Factor

factor that causes the growth of a population to decrease

Natural Selection

process by which individuals that are better suited to their environment survive and reproduce most successfully


the behaviors and physical characteristics that allow organisms to live successfully in their environments


the role of an organism in its habitat or how it makes its living


the struggle between two organisms to survive as they attempt to use the same limites resource

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