Here's a breakdown:

* Polymer: A large molecule made up of many smaller, repeating units called monomers.

* Monomer: The individual building block of a polymer.

Think of it like a chain where each link is a monomer. By linking many monomers together, you create a long chain – the polymer.

Examples of polymers:

* Polyethylene: Made of repeating ethylene monomers (found in plastic bags)

* Starch: Made of repeating glucose monomers (found in plants)

* Proteins: Made of repeating amino acid monomers (found in our bodies)

* DNA: Made of repeating nucleotide monomers (carries genetic information)

Let me know if you'd like to know more about any specific type of polymer!