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All of the living and nonliving things that interact in an area

Biotic factors

Living things (organisms) in an ecosystem.

Abiotic factors

Nonliving things in an ecosystem.


The specific environment that supplies all the organism's needs


A group of similar organisms that can mate with one another and produce fertile offspring.


The role an organism has in its environment.


An organism that can make its own food.


An organism that obtains energy by feeding on other organisms.


Consumers that eat only plants.


Consumers that eat both plants and animals.


Consumers that eat only animals.

Detritivore - Scavenger

Consumer that feeds on the bodies (remains) of dead organisms.


Organisms that break down wastes and dead organisms and return the raw materials to the environment.

Food chain

A series of events in which one organism eats another and obtains energy.

Food web

Overlapping food chains in an ecosystem.

Energy pyramid

A diagram that shows the amount of energy available in each step (trophic level) of a food chain.


The process in which producers use light energy to make food.


The process in which producers use chemical energy (rather than light energy) to make food.

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