5 ATHENA ch 5 Scott Foresman 2008

vocabulary word definition
ecosystem all the living and nonliving things in an area
population a group of organisms of one species that live in an area at the same time
community the group of all the populations in an area
niche the job that an organism has in an ecosystem
habitat the place in an ecosystem in which an organism lives
energy pyramid a diagram that shows the amounts of energy that flows through each level of a food chain
cycle a repeating process or flow of material through a system