PHYSICS: Can you explain the difference between special and general relativity?

I have to write a short 2 page paper about general relativity. I started to write about how you can't describe motion w/out a frame of reference and stuff like that, but I read that that's actually what special relativity is.





So what's the difference between special and general relativity?





Thanks!!|||Special Relativity deals only with objects which are not acted upon by any external forces. General Relativity adds gravity into the equations, in the form of a curvature of space-time caused by massive objects.





Easy way to remember this: SPecial relativity deals with SPeed, whereas General relativity deals with Gravity.|||Special relativity deals with measurement in inertial frames of reference and the effects of the constant speed of light regardless its conditions of motion.


General relativity deals with measurements in any frame of referece and the effects of gravity as the curvature of space.|||Special Relativity does not deal with acceleration by gravity, or anything but very simple, straight-line accelerations (and of course just inertial motion). General Relativity does, via the "Equivalence Principle".