Scientific Theory vs. Law
Definition
Scientific Theory: A well-substantiated explanation of some aspect of the natural world that is acquired through the scientific method and repeatedly tested and confirmed, preferably using a written, pre-defined, protocol of observations and experiments.
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Scientific Law: Is a statement based on repeated experimental observations that describes some aspects of the universe. It always applies under that same conditions, and implies that there is a casual relationship involving its elements.
"Most people use the word 'theory' to mean an idea or hunch that someone has, but in Science the word 'theory' refers to the way that we interpret facts."
Jamie Tanner, professor of Biology at Marlboro College
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The University of California, Berkley defines a theory as "a broad, natural explanation for a wide range of phenomena. Theories are concise, coherent, systematic, predictive, and broadly applicable, often integrating and generalizing many hypotheses."
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"In the scientific method, there is a clear distinction between facts, which can be observed and/or measured, and theories which are scientists' explanations and interpretations of the facts."
Alina Bradford, Live Science Contributor