Use the following in the same sentence:

Monomer, Polymer, condensation reaction, and hydrolysis

When a monomer goes to a polymer it goes through a condensation reaction, but when a polymer goes to a monomer it goes through hydrolysis.

Explanation:

Condensation reaction is when two molecules are being combined into one molecule and has a byproduct of water.

Hydrolysis is the spliting of two molecules into their own molecule with the use of water.