Theory
A scientific theory is a well tested concept that explains a wide range of observations.
If by "why" you mean "what," a well tested framework that explains a wide range of observations in science is called a theory.
It is a scientific theory.
It is called a Scientific Theory.
A theory. (And sometimes called a law.)
It is a scientific theory.
A SCIENTIFIC THEORY is a well-tested concept that explains a wide range of observation. (IF YOU ARE USING THIS TO CHEAT ON YOUR SCIENCE HOMEWORK, THEN YOU'RE NOT ALONE) lol
A theory. (And sometimes called a law.)
A theory unites and explains a broad range of observations.
A theory unites and explains a range of observations.
A well tested explanation of a wide range of observations is known as a Theory, such as the Theory of Gravity or the Theory of Evolution.
Theory A scientific theory is a well tested explanation for a wide range of observations or experimental results