Here's the breakdown:

* Photosynthesis is the process where plants use sunlight, water, and carbon dioxide to create glucose (sugar) and oxygen.

* The water molecules are split apart in the process, releasing electrons and hydrogen ions.

* The oxygen atoms from the water molecules combine to form oxygen gas, which is released into the atmosphere.

So, while water is a reactant in photosynthesis, it's not directly converted into glucose. The oxygen atoms from water are what become the oxygen gas we breathe.