| A | B |
|---|
| community | a group of different species that live together in one area |
| ecosystem | all of the organisms as well as the climate, soil, water, rocks, and other nonliving things in a given area |
| population | a group of organisms all of the same species living in the same area |
| abiotic factor | nonliving things such as moisture, temperature, wind, sunlight, and soil |
| biotic factor | living things, such as plants, animals, fungi, and bacteria |
| producers | organisms that get their energy from nonliving resources (they make their own food) |
| autotrophs | a producer that makes their own food |
| heterotrophs | a consumer that gets their food by eating other living things |
| consumer | organisms that get their energy by eating other living or once-living resources, such as plants and animals |
| food web | a model that shows the complex network of feeding relationships |
| biomass | a measure of the total dry mass of organisms in a given area |
| energy pyramid | a diagram that compares energy used by producers, primary consumers, and other trophic levels |
