| Term | Definition |
| pigment | Colored substance that absorbs of reflects light |
| Calvin | Cycle formed by dark photosynthesis reactions |
| chlorophyll | Principle pigment of green plants |
| autotroph | organism that can produce its own food |
| alcoholic | Type of fermentation that occurs in yeasts and a few other microorganisms |
| photosynthesis | Process in which plants convert the energy of sunlight into chemical energy |
| calorie | Amount of heat energy required to raise the temperature of 1 gram of water 1 degree Celsius |
| glucose | C6 H12 O6 |
| fermentation | Process that enables cells to produce energy anaerobically |
| photosystem | Clusters of pigment molecules |
| ATP | Most important energy-storing compound |
| light | Photosynthetic reactions that use the energy of sunlight and convert it to the energy in chemical bonds |
| lactic acid | Type of fermentation that occurs in muscles during rapid exercise |
| glycolysis | Word that means glucose breaking |
| dark | Photosynthetic reactions that can be carried out in the absence of light |
| anaerobic | Does not require oxygen |
| heterotroph | Organism that cannot produce its own food |
| Krebs | Cycle formed by the first set of reactions during respiration |
| aerobic | requires oxygen |