| A | B |
| absorption spectrum | spectrum produced representing the wavelengths absorbed by a substance |
| aerobic respiration | respiration requiring oxygen |
| alcoholic fermentation | anaerobic process in which enzymes break down a glucose molecule into two molecules of ethanol and two molecules of carbon dioxide |
| anerobic | without oxygen |
| ATP | molecule knows as adenosine triphosphate, releases free energy used to drive endergonic reactions |
| Calvin cycle | the synthesizing sugars part of photosynthesis |
| carotenoid | yellow, orange and red pigments |
| endergonic | chemical reactions that require free energy |
| exergonic | chemical reactions that release energy |
| free energy | energy available to do work |
| grana | stacks of thylakoid membranes |
| lactic acid fermentation | anaerobic process in which enzymes break down a glucose molecule into two lactic acid molecules |
| light reactions | series of reactions which convert light energy into chemical energy |
| stroma | fluid part of the chloroplast containing many enzymes and other molecules |
| visible spectrum | range of colors that make up white light |
| wavelength | distance between one wave crest and the next |