Evolutions as a process is a fact. How evolution occurs is covered in the Theory of Evolution. Please note that a scientific theory is not the same as a conversational theory. There's the Theory of Gravity, i.e. how gravity works. Gravity itself is fact - just like evolution.
Yep. A theory, in scientific lingo, means "a hypothesis that has been confirmed or established by observation or experimentation, and is propounded or accepted as accounting for the known facts." This is how it's used in the theory of evolution.
