Worth 50 !
how is photosynthesis a chemical reaction?
can you also with the second part of this question
why is photosynthesis classified as endothermic?

you so much you are the ! : )

 i hope this helps!!

Overall reaction of photosynthesis In chemical terms, photosynthesis is a light-energized oxidation–reduction process. (Oxidation refers to the removal of electrons from a molecule; reduction refers to the gain of electrons by a molecule.) Photosynthesis turns carbon dioxide and water into oxygen and carbohydrates, therefore a chemical change occurs. It is also an endothermic reaction, because, energy needs to be inputted in order for photosynthesis to occur.

Explanation:

the dissolution of polymer can be thermodynamically described in 2 steps.

nuclear fission produces elements that are heavier than helium.

the elements that are used in nuclear fission and their products are much heavier than helium.