It's been quite a while since either of my kids took the EXPLORE through talent search, but as I recall, the two scores that are probably least dependent on exposure are science and maybe English. Science doesn't test so much scientific knowledge as problem solving capability. I believe that was one of the highest scores for both of my kids as well, even the one who doesn't adore science.

I don't know what to make of the English and math scores not being where you'd expect, though.