Video narration
How does your houseplant get food-does sunlight simply become food, or does the soil feed it? By the window, roots take in water, while leaves take in carbon dioxide from the air and catch sunlight. But the plant is not eating sunlight. It uses light energy to build glucose, a sugar, from water and carbon dioxide. That process is photosynthesis: glucose supports growth, and oxygen is released. So it makes food from water and air using sunlight.