Question

An equilibrium is dynamic.

Answer 1

Equilibrium is dynamic since the reaction never really stops.  There is still a forward and reverse reaction, their rates are just equal to each other so there is no observable change in the amounts of product or reactant making it look like the reaction has stopped.

This is why you will often here the term dynamic equilibrium used when describing a system in equilibrium.

I hope this helps.  Let me know if anything is unclear.