| A | B |
| Photosynthesis | process of converting light energy into chemical energy |
| Respiration | process of breaking food to release energy in the presence of oxygen |
| Fermentation | process that releases energy from food when oxygen is not available |
| Lactic acid | byproduct of fermentation in muscles, causes cramps |
| Oxygen | gas produced in photosynthesis, used in respiration |
| Carbon dioxide | gas produced in respiration, used in photosynthesis |
| Light dependent reactions | first set of reactions in photosynthesis |
| Calvin cycle | second set of reactions in photosynthesis |
| Electron transport chain | system of molecules that carries electrons to form ATP |
| Kreb's cycle | aerobic stage of respiration that breaks down pyruvic acid |
| ATP | main energy molecule in cells |
| Glucose | primary sugar made in photosynthesis |
| Aerobic | requires oxygen |
| Anaerobic | does not require oxygen |
| Calorie | amount of energy to raise 1 g water 1 degree C |
| Autotroph | makes its own food |
| Heterotroph | consumes food for energy |
| Glycolysis | breaks glucose into pyruvic acid |
| Chlorophyll | principal pigment in green plants |
| Chloroplast | organelle used in photosynthesis |
| Mitochondria | site of respiration, specifically the Kreb's Cycle |
| Pigment | substance that captures light |
| Photosystems | cluster of pigments |
| Thylakoid | photosynthetic sacs in chloroplasts |
| Granum | a stack of thylakoids |