Theory is an idea, an argument that something is true. These are usually a series of interrelated parts or variables, definitions, and propositions that present a systematic view of a particular phenomenon. A model determines the relationship between variables, intending to explain the phenomenon.
The theory statement is generally only accepted temporarily and is not a conclusive final statement. It is because theory comes from drawing conclusions that have the potential for error. The theory is different from the theorem, which is a conclusion in the proof of mathematics.
Theory in science means a model or frame of mind that explains natural phenomena or certain social phenomena. It is formulated, developed, and evaluated through scientific methods. It is also considered as a hypothesis that has been proven true. Humans build theories to explain, predict, and understand certain phenomena.