The law of superposition states that in horizontal rock layers, the oldest layers are at the bottom. Which statements explain why this is a law and not a theory? Check all that apply.It has changed as technology advanced.It describes the order of rock layers.It is a statement of fact.It has been revised over time.It explains how rock layers form.

The law of superposition describes an observed pattern: in undisturbed horizontal rock layers, older layers are below younger ones. A scientific law summarizes what happens, so it is a statement of fact about the order of the layers. It does not explain how the layers form; explanations of how or why are scientific theories.

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