I got all but 2
I realize it's not entirely correct, and I did get "Gravitational Potential Energy", but I think it could be nice to accept Potential Energy for that one, since a lot of people studying mechanics would probably think of it as just "potential energy" and perhaps not spell it out in detail.
Still, great quiz!
I had a tough time also with "Refractive Index," as, like most people, I tried "Index of Refraction," and then just panic typed a bunch of other options until something took.
After the frustration of these two, I gave up after trying various permutations and perturbations of "Hydrostatic Pressure due to a Column of Fluid/Liquid" for the last one. Seeing "Pressure Difference" was mildly frustrating after all of that effort to try to guess what you were thinking.
Overall, I still enjoyed the quiz. I would strongly suggest you fix a few minor problems with it, though, as it could be a great quiz instead of just a good one with a little "TLC."