A scientific theory is a well-substantiated explanation of some aspect of the natural world that is acquired through the scientific method and repeatedly tested and confirmed through observation and experimentation.
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A scientific law is a statement based on repeated experimental observations that describes some aspects of the universe. A scientific law always applies under the same conditions, and implies that there is a causal relationship involving its elements.The principal difference between a scientific theory and a scientific law, is that a theory is something that is not completely demonstrate. Then a scientific theory is a step before a law.
