| A | B |
| Autotroph | an organism that harvest energy from the sun to create sugar |
| Heterotroph | an organism that must consume other organisms for energy |
| Biochemical pathway | a series of linked chemical reactions |
| Calvin cycle | the second part of photosynthesis, carbon dioxide is changed into sugars |
| light reactions | the first part of photosynthesis, energy from the sun is used to spilt water molecules |
| carbon dioxide | a starting material for photosynthesis |
| water | a necessary material for photosynthesis |
| sugar | a product of photosynthesis |
| oxygen | a product of photosynthesis |
| glucose | a specific sugar produced by photosynthesis that is used in cellular respiration |
| photosynthesis | the process of converting light energy into chemical energy |
| light energy | must be absorbed for photosynthesis to begin |
| chloroplast | organelle where photosynthesis occurs |
| chlorophyll | green pigment that absorbs sunlight to begin the light reactions |