| A | B |
| Chemosynthesis | Making organic compounds using energy released from chemicals |
| Chlorophyll | Green pigments found in photosynthetic organisms |
| Photosynthesis | The process by which organisms make organic compounds by using the energy in sunlight |
| Cellular respiration | The process by which cells derive energy from organic compounds |
| Producers | A photosynthetic or chemosynthetic organism that makes its own food |
| Consumers | An organism that feeds on other organisms |
| Herbivores | A consumer that eats plants |
| Carnivores | A consumer that eats meat |
| Omnivores | A consumer that eats both plants and animals |
| Scavengers | An animal that feeds on dead organisms |
| Decomposers | An organism that obtains energy and food from decaying organic matter |
| Food Chain | The transfer of matter and energy from one organism to another |
| Food Web | An interrelated group of food chains in a community |
| Trophic level | A feeding level in a food chain |
| Apex predators | The top predator in an ecosystem |
| Biomass | The total amount of organic matter in an area |
| Ecosystem | A community of interdependent organisms and their environment |
| Adaptations | An inherited trait that helps an organism survive and reproduce |
| Phytoplankton | Usually microscopic, photosynthetic organisms, mostly algae and diatoms, found in water |
| Zooplankton | Usually microscopic, non-photosynthetic plankton consisting of animals and animal-like organisms |