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21 terms

7th Grade - Ecology Science Definitions

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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