| A | B |
| Photosynthesis | Process by which organisms use light energy to produce organic compounds. |
| Autotroph | Organism that obtains energy from sunlight or inorganic substances. |
| Heterotroph | Organism that must get energy from food sources. |
| Cellular Respiration | Process by which living organisms harvest the energy in food molecules. |
| Pigment | Molecule that absorbs certain wavelengths of light. |
| Chlorophyll | Pigment responsible for trapping light energy in photosynthesis. |
| Carotenoid | Yellow and orange pigments that aid in photosynthesis. |
| Thylakoid | Internal membrane-sac of a chloroplast. |
| Aerobic | Term for processes that require oxygen. |
| Anaerobic | Term for processes that do not require oxygen. |
| Glycolysis | Biochemical pathway that breaks down glucose. |
| Fermentation | Anaerobic process of cellular respiration. |