Answer:
Chemical change is a change in which there is rearrangement of atoms and thus new substance is formed. There may or may not be a change in physical state.
Photosynthesis is a phenomenon in which green plants containing chlorophyll use sunlight as a source of energy to convert carbon dioxide and water to form glucose and oxygen. The energy from light causes a chemical reaction that breaks down the molecules of carbon dioxide and water and reorganizes them to make the sugar and oxygen gas.
![6CO_2+6H_2O\rightarrow C_6H_(12)O_6+6O_2](https://img.qammunity.org/2022/formulas/biology/high-school/8r7y6go1v8q7tt0nwthk3cskd13tpk4n61.png)