This document contains 18 figures that summarize key concepts about photosynthesis. Photosynthesis is the process by which plants, algae, and some bacteria use sunlight, carbon dioxide, and water to produce oxygen and energy-storing sugars. It is the foundation for almost all life on Earth as it produces the oxygen and food that organisms need. The figures outline the light-dependent reactions where ATP and NADPH are produced to fuel the Calvin cycle reactions that incorporate carbon into organic molecules like glucose. Photosynthesis occurs in chloroplasts in plant cells and involves the absorption of light by chlorophyll and transfer of electrons and protons.