Photosynthesis is the process by which plants convert carbon dioxide and water into glucose and oxygen in the presence of sunlight. The balanced chemical reaction for this process can be written as:

`6CO_2 (g) + 6H_2O (aq) + sunlight -> C_6H_12O_6 (s) + 6O_2 (g)`

There are different phases (or states) of matter, such as solid, liquid, gas and plasma. Photosynthesis represents the consumption of some reactants and production of some products, during which phase transformations take place. For example, carbon dioxide is in the gas phase and water is in the liquid or aqueous phase, while glucose is in its solid phase and oxygen is in its gas phase. Photosynthesis involves matter transforming into entirely new molecules in different physical states.

This process also involves energy transformations. Photosynthesis uses the light energy of the sun and converts it to chemical energy (stored in glucose molecules). The chemical energy of glucose is converted to ATP molecules during the process of cellular respiration and is then used by organisms. 

Thus, photosynthesis involves both matter and energy transformations. 

Hope this helps.