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Chapter 9 science.

TermDefinition
Biosphere The parts of Earth and the surrounding atmosphere where there is life.
Community All the populations of different species that live together in the same area at the same time.
Population All the organisms of the same species that live in the same area at the same time.
Competition The demand for resources, such as food, water, and shelter, in short supply in a community.
Limiting factor Anything that restricts the size of a population.
Population density The size of a population compared to the amount of space available.
Biotic potential The potential growth of a population if it could grow in perfect conditions with no limiting factors.
Carrying capacity The largest number of individuals of one species that an environment can support.
Birthrate The number of offspring produced over a given time period.
Death rate The number of individuals that die over the same time period.
Extinct species A species that has died out and no individuals are left.
Endangered species A species whose population is at risk, but not yet endangered.
Threatened species A species at risk, but not yet endangered.
Migration The instinctive seasonal movement of a population of organisms from one place to another.
Habitat The place within an ecosystem where an organism lives.
Niche What a species does in its habitat to survive.
Producers Organisms that get energy from the environment, such as sunlight, and make their own food.
Consumers Organisms that get energy by eating other organisms
Symbiosis A close, long-term relationship between two species that usually involves an exchange of food or energy.
Mutualism A symbiotic relationship in which both partners benefit.
Commensalism A symbiotic relationship that benefits one species but does not harm or benefit the other.
Parasitism A symbiotic relationship that benefits one species and harms the other.
Created by: user-1711682
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