Science Fair Summary Plants need water in order to perform photosynthesis which allows the plant to grow. There are three main ingredients that is needed to make glucose, a plant's food. To begin, water is one of the three main ingredients for photosynthesis, which is how a plant makes their food. “Carbon dioxide reacts to the presence of light to produce glucose”. Sunlight is the second of three ingredients needed for photosynthesis. The plant uses the energy from the sun to pull out hydrogen from the water. Soil is the third ingredient needed to produce glucose, without it, the plant has nowhere to spread its roots and grow. In addition, without water, soil, sunlight, photosynthesis is impossible and the plant will not grow. Without
