7th Grade - Ecology Science Definitions

21 terms by judithn

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ecology

the study of the interactions between organisms and their environment

biotic

describes living factors in the environment

abiotic

describes non-living things in the environment

population

a group of individuals of the same species that live together in the same area at the same time

community

all of the populations of different species that live and interact in an area

ecosystem

a community of organisms and their non-living environment

biosphere

a part of the Earth where life exists

herbivore

a consumer that eats plants

carnivore

a consumer that eats animals

omnivore

a consumer that eats a variety of orgaisms

scavenger

an animal that feeds on the bodies of dead animals

decomposer

an organism that gets energy by breaking down the remains of dead organisms or animal wastes and consuming or absorbing the nutrients

producer

organisms that produce their own food, usually the energy from sunlight to make sugar

consumer

an organism that eats producers or other organisms for energy

food chain

a diagram that represents how the energy in food molecules flows from one organism to the next

food web

a complex diagram representing the many energy pathways in a real ecosystem

energy pyramid

a diagram shaped like a triangle that shows the loss of energy at each level of the food chain

habitat

the environment where an organism lives

niche

an organism's way of life and its relationships with its abiotic and biotic environments

deciduous

a tree, shrub or bush that loses its leaves in the autumn (fall) and grows them back in the spring

evergreen

a tree, shrub or bush that does not lose its leaves or needles in the fall and winter and keeps them all year long

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