In science, however, the term theory has no such implication. A theory is simply an explanation or interpretation of a set of phenomena. It can be untested, but it can also be extensively tested, well supported, and accepted as an accurate description of the world by the scientific community. The theory of evolution by natural selection, for example, is a theory because it is an explanation of the diversity of life on earth—not because it is untested or unsupported by scientific research.
In section I learned that in the scientific context, the term theory does not imply uncertainty or lack of testing. Instead, a scientific theory is seen as an explanation of a set of phenomena, because it can range from being untested to extensively tested and widely accepted within the scientific community. The example provided, the theory of evolution by natural selection, is considered a theory not because it is untested, but because it serves as an explanation for the diversity of life on Earth and has gained strong support through scientific research.