A scientific theory is what?

A theory is well-supported explanation that explains and demonstrate how and why something works that manner; with a lot of evidences, experiments, claims, and observations. Is known as theory when all scientists are agree with the idea also.

Once a hypothesis (an educated guess) has been supported by many experiments, which have been performed by many different scientists, it can be represented as a theory. When many scientists reach the same or similar conclusions, the conclusion is called a theory.