Scientific Theory tries to provide the most logical explanation about why things happen as they do.
Ex: Gravity could be the reason for the parabolic trajectory of a baseball.
Theory proposes why.
A theory will never grow up into a law.
A theory’s acceptance, however, is often gladiatorial. Multiple theories may compete to supply the best explanation of a new scientific discovery. Upon further research, scientist tend to favour the theory that can explain the most of the data, though there may still be gaps in our understanding.
A good scientific theory is a bruised, but unbowed, fighter who risks defeat if unable to overpower or adapt to the next challenger.
General theory of relativity
It describes gravity as the curvature of spacetime caused by the presence of mass and energy, affecting the motion of objects and the flow of time
a phenomenon is an observable event, a scientific theory provides an explanation of why it occurs, and a scientific law describes what happens, often in a precise mathematical form, without necessarily explaining the underlying cause.