| Term | Definition |
| Autotroph | An organism that can make its own food. |
| Biomass Conversion | Changing of organic matter into useful liquid, gas or fuel. |
| Chlorophyll | Green pigment found in plants |
| Chloroplasts | Food-making site inside a plant. |
| Environment | The biotic and abiotic factors that influence living things. |
| Heterotroph | An organism that is unable to make its own food. |
| Photosynthesis | Process by which autotrophs combine CO2 and water in the presence of sunlight to produce O2 and water. |
| Products | What is produced as a result of a chemical reaction. |
| Reactants | The ingredients in a chemical reaction. |
| Stomata | Openings on leaves that take in CO2 and release O2 and H2O. |
| Transpiration | Movement of water from the roots, through the plant, and exit through the stomata |
| Trophic Levels | The role of an organism in nutrient and energy flow |