1. Carbon dioxide in the air comes in through the stomates (those little holes in the leaf). By ts254 Apr 10, 2010 1. Carbon dioxide in the air comes in through the stomates (those little holes in the leaf). Apr 11, 2010 2. Water comes into the leaf from the roots Apr 12, 2010 3. Sunlight strikes the surface of the leaf and its energy is trapped by the chlorophyll. Apr 13, 2010 4. The energy helps change part of the water to hydrogen and oxygen Apr 14, 2010 5. The hydrogen joins with the carbon dioxide to make food for the plant. Apr 15, 2010 6. Oxygen gas comes out of the leaf through the stomates