Static vs. dynamic cord?

I have both prussik loops and prussik purcells, tied from cord, sized for my height. I also have a good sized hank of heftier static cord.

I have no idea if any of the smaller cords are dynamic, or if such a thing exists. But, as I press these into service for various uses, should I seek out a dynamic component? 

My uses could include personal anchors (Purcell), a prussik with the bigger static if I ever choose to anchor myself at the base of a single pitch climb, I could use the same rig up top as a tether near the cliff face, on and on, and a prussik is an easy go to for me.

These are my very first climbing gear, by the way, and ascending a rope the first thing I learned and what drew me into climbing.

Thanks! Helen

I believe most are static, which is acceptable and normal. That said, it is possible to find dynamic and that is what I did for my Purcell Prusik. I used this: https://www.bluewaterropes.com/product/dynamic-prusik-cord/

However, its totally unnecessary as the prusik knot slips a bit with the purcell which is part of the reason works so well. When using a prusik for a makeshift anchor (crevasse rescue?) I'd rather it be static.