The process used by plants to convert sunlight into energy is called photosynthesis. During photosynthesis, plants take in carbon dioxide from the atmosphere and water from the soil, utilizing sunlight as an energy source to convert these into glucose and oxygen. This fundamental process occurs in the chloroplasts of plant cells, where chlorophyll captures light energy. The glucose produced serves as food for the plant, providing energy for growth, reproduction, and cellular functions. Photosynthesis is essential for life on Earth, as it not only fuels plants but also produces oxygen, which is vital for many living organisms.