biome
an ecosystem that covers a large area, has certain plants and animals, and has a specific climate
biosphere
the places on Earth where life is found
community
all the different populations living in the same place at the same time
ecosystem
all the living and nonliving things that interact in a specific place
habitat
the place in which an organism lives within its ecosystem
niche
the function or role of each organism in an ecosystem
population
a group of one kind of organism living in one place at the same time