| A | B |
| reactant | the starting material(s) in a chemical reaction which can be rearranged to form products |
| product | the ending material(s) in a chemical reaction |
| chlorophyll | the light-absorbing pigment found inside the chloroplast that gives the plant its green color. |
| metabolism | the sum of all chemical reactions within an organism |
| photosynthesis | the process through which plants convert light energy to chemical energy in order to produce food |
| energy | the capacity to make things happen or to do work |
| ATP | molecule that usually carries energy for the cell |
| cellular respiration | the process by which the stored energy in glucose is converted into a usable form (ATP) |
| anaerobic respiration | respiration without oxygen that often leads to fermentation and no additional ATP produced |
| aerobic respiration | respiration that requires oxygen and produces 36 total ATP |
| mitochondrion | the "powerhouse of the cell" where aerobic respiration takes place |
| chemosynthesis | using chemicals to make chemical energy |