| A | B |
|---|
| chloroplast | organelle found in some plant cells and certain unicellular organisms where photosynthesis takes place |
| chlorophyll | pigment that gives a chloroplast its green color; uses light energy to split water molecules during photosynthesis |
| stroma | thick fluid contained in the inner membrane of a chloroplast |
| thylakoid | disk-shaped sac in the stroma of a chloroplast; site of the light reactions of photosynthesis |
| light reactions | chemical reactions that convert the sun's energy to chemical energy; take place in the membranes of thylakoids in the chloroplast |
| Calvin cycle | cycle in plants that makes sugar from carbon dioxide, H+ ions, and high-energy electrons carried by NADPH |
| wavelength | distance between adjacent waves |
| electromagnetic spectrum | range of types of electromagnetic energy from gamma waves to radio waves |
| pigment | chemical compound that determines a substance's color |
| paper chromatography | laboratory technique used to observe the different pigments in a material |
| photosystem | cluster of chlorophyll and other molecules in a thylakoid |
| carbon cycle | process by which carbon moves from inorganic to organic compounds and back |
| greenhouse effect | process by which atmospheric gases trap heat close to Earth's surface and prevent it from escaping into space |
