When a green plant is placed in water and exposed to light, it carries out photosynthesis—a process in which the plant uses light energy to convert carbon dioxide and water into food, releasing oxygen as a byproduct. The oxygen produced during this process appears as tiny bubbles that form on the surface of the plant’s leaves and rise through the water. These bubbles make the oxygen production clearly visible. By placing the plant in a transparent container filled with water and shining a light