I am not an expert in testing at all, but my DS10 sounds a lot like your son - at least as far as interests. He has always stood out for science knowledge and interest and had an amazing amount of knowledge before he started K. Now - by fourth grade, for some reason he also stands out a lot with verbal things - poetry and these analogy competitions that his school does. That would not have seemed likely to me at all when he was younger. Anyway, when he was tested he did well on the WISC - it does not give a science score, but I think the verbal catagories are helped a lot by a solid knowledge of science at that age (vocabulary and word reasoning are helped a lot by knowledge of things that are unusual for your age). There is also an optional subcategory called information that would capture some of that. My son did not do as well on the achievement testing - (he did okay, but not DYS levels and definetly lower than his WISC) however, we were doing that as part of an ADHD eval (which he also has). I think there was a catagory on that testing for science and social studies knowledge where he scored really high though. His lower scores were math (too many careless errors and low speed since he was not interested in memorizing the basic facts) and writing (continues to be a major issue for him).
By the way, I have a second son (DS8) who has qualifying scores for DYS. I sent his application in last month and have not heard. My older son is highly gifted but doesn't quite have the scores for DYS. Also, his strongest things at this point - science and verbal - are things that can be managed well in a full time GT classroom, which is where he goes now.
Good luck!
