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15 terms

Science 7th

7th grade science vocabulary.
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Symbiosis
the relation between two different species of organisms that are interdependent
Immigration
movement of individuals into an area occupied by an existing population
Emmigration
movement of individuals out of a population
Predator
any animal that lives by preying on other animals
Prey
animal hunted or caught for food
Predation
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
Adaptations
the behaviors and physical characteristics that allow organisms to live successfully in their environments
Niche
the role of an organism in its habitat or how it makes its living
Competition
the struggle between two organisms to survive as they attempt to use the same limites resource