| A | B |
|---|
| ecosystem | groups of living things and their environment |
| population | agroup of the same speciec living in an area at the same time |
| community | all the populations the live in the same area |
| habitat | an environment that meets the needs of an organism |
| niche | all the ways an organism meets it's basic needs |
| producers | make their own food |
| consumers | eat other living things for energy |
| decomposers | feed on the wastes of plants and animals or their remains |
| energy pyramid | a diagram that shows how much energy is passed from one organism to another along a food chain |
| food web | a diagram that shows how food chains connect and overlap |
