| A | B |
| Carbon dioxide | $ CO_2 $ |
| Water | $ H_2O $ |
| Glucose | $ C_6H_{12}O_6 $ |
| Chlorophyll | green pigment that traps light |
| Chloroplast | organelle where photosynthesis happens |
| diatomic oxygen | $ O_2$ |
| Photosynthesis | process by which green plants convert light energy to chemical energy |
| Respiration | process by which stored chemical energy is released for use by cells |
| anaerobic respiration | first stage of respiration happening in the cytoplasm without oxygen |
| aerobic respiration | second stage of respiration using oxygen in the mitochondria |
| mitochondrion | organell in which respiration happens |
| stomata | small openings on the underside of leaves |
| autotrophs | organisms that can make their own food |
| heterotrophs | organisms that depend on other organisms for food |
| fermentation | a process that provides energy to cells without using oxygen |
| alcoholic respiration | process used by yeast cells to get energy and release carbon dioxide and alcohol |
| lactic acid fermentation | process releasing energy in muscles when you work harder than your body can supply oxygen to the muscles |
| lactic acid | a product of anaerobic respiration that causes muscles to be tired and sore |