A theory is a scientific explanation of a phenomenon that is backed up by a significant amount of supporting evidence. It is broad in scope and has been tested repeatedly over time. It is not necessarily "proven," but the evidence supports it as the most likely explanation for a given phenomenon.

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A Theory Is

Question 28

Multiple Choice

A theory is

A) an idea that has been proven.
B) a concept in the early stages that still needs to be tested.
C) a description of a belief that invokes the supernatural.
D) an explanation of an idea that is broad in scope and supported by a large body of evidence.

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