What Are the Top Unresolved Questions in Theoretical Physics Today?

[@220]

Hello guys.
I am a molecular biology student and at my physics class I have an assignment which says "What are the top 5 unsolved problems at theoretical physics nowadays? "
I am thinking of including the;
*string theory,
*super-symmetry,
*quantum chromodynamics,
*quantum gravity,
*theory of everything.
Could you please help me, by telling me if i am at right way or suggest me to include other theories?
Thanks in advance!

Ps. Please forgive my poor English.

 

[wizang]

I'm not a huge expert but let me clarify a couple things for you. Your points 1,2,4,5 are all really the same thing in the sense that you are talking about grand unification (well not #2 strictly, but its related). Unifying quantum mechanics and general relativity is probably the #1 thing on your list, and like I said 1,2,4,5 are all directly related to that, so I don't think you get use use them more than once :). Also, #3, quantum chromodynamics is a very well established field, not sure I would really call it an unsolved problem in physics. My 2cents.

Edit: See this link for some helpful suggestions http://en.wikipedia.org/wiki/List_of_unsolved_problems_in_physics