| A | B |
|---|
| biotic factors | organisms that make up the living part of an ecosystem |
| ecosystem | a system made up of organisms interacting with one another and with the nonliving parts of the system |
| ecology | the study of the interactions in an ecosystem |
| abiotic factors | nonliving things found in an ecosystem |
| biosphere | the part of Earth where organisms can live |
| limiting factor | something that limits the size of a population |
| population | a group of the same type of organisms living in the same place at the same time |
| community | all of the populations that live in an area |
| niche | the role of an organism in its ecosystem |
| producer | an organism in a food chain that makes its own food |
| consumers | the organisms in a food chain that eat other organisms in the same food chain |
| decomposers | organisms that eat dead organisms and waste material from other organisms |
| habitat | place where an organism lives out its life |
