Scientific theory is the concept, idea or principle that arise from scientific method, experiment or testing. It usually has a basis which results from a conclusion gathered from a specific observable data. Here's the link for more information: http://www.ask.com/wiki/Scientific_theory.
Scientific theory is defined as an opinionated study on how things occur or works based on evidence. A theory will become a fact only when the evidences are proven correct and in relation to the study.