Autotroph: an organism that makes its own food; also called a producer carnivore: an animal that only eats other animals
consumer: an organism that eats other organisms; also called a heterotroph
decomposer: an organism that breaks down waste and dead organisms
energy pyramid: a diagram illustrating the amount of energy available at each feeding level in an ecosystem
food chain: a model that shows the feeding relationships between organisms in an ecosystem
food web: a model that shows the interconnected food chains in an ecosystem
herbivore: an animal that eats only plants
heterotroph: an organism that eats other organisms; also called a consumer
omnivore: an animal that eats both plants and animals
producer: an organism that makes its own food; also called an autotroph
trophic level: the position of an organism in a food web or energy pyramid