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Grade 8 Ch E2
Science Explorer Environmental Science Ch 2
Question | Answer |
---|---|
biotic factor | a living (or once living) part of an organisms’ habitat |
abiotic factor | a nonliving part of an organism’s habitat |
population | all the members of one species in a particular area |
community | all the different populations that live together in an area |
ecology | the study of how living things interact with each other and their environment |
immigration | entering a population |
emigration | leaving a population |
population density | the number of individuals in an area of a specific size |
limiting factor | an environmental factor that causes a population to decrease |
carrying capacity | the largest population that an area can support |
symbiosis | a close relationship between two species that benefits at least one of the species |
mutualism | a relationship between two species in which both species benefits |
commensalism | a relationship between two species in which one species benefits and the other is neither helped nor harmed |
parasitism | a relationship in which one organism lives on or in a host and harms it |
primary succession | the series of changes that occur in an area where no soil or organisms exist |
pioneer species | the first species to populate an area |
secondary succession | the series of changes that occur in an area where the ecosystem has been disturbed but where soil and organisms still exist |