| A | B |
| Biomass | biological material from living things |
| Food chain | diagram that shows energy flow |
| food web | overlapping food chains |
| decomposers | break down dead organisms |
| 10% rule | amount of energy passed to next trophic level |
| compost bin | place where decomposition takes place |
| brown | materials that contains carbon in a compost bin |
| green | material that contains nitrogen in a compost bin |
| primary consumer | trophic level that eats plants |
| secondary consumer | trophic level that eats animals that eat plants |
| tertiary consumer | trophic level that eats animals that eat animals that eat plants |
| arrows in a food chain | show where the energy goes |
| autotrophs | another name for producer/plants that make own food |
| heterotrophs | another name for a consumer/ eats for energy |
| herbivore | eats only plants |
| carnivore | eats only meat/animals |
| omnivore | eats both plants and animals |
| source of most energy | the sun |
| predator | hunts for its food |
| prey | is hunted and eaten by another organism |
| mushroom | example of a fungus decomposer |
| energy pyramid | triangular shaped diagram showing the trophic levels of energy |
| warmer | temperature inside a compost bin |
| phytoplankton | floats in ocean/producer |