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If such a hypothesis turns out to be capable of explaining a large body of experimental data , it can reach the status of a theory . Scientific theories are well-substantiated , comprehensive , testable explanations of particular aspects of nature . Theories are accepted because they provide satisfactory explanations , but they can be modified if new data become available . The path of discovery that leads from question and observation to law or hypothesis to theory , combined with experimental verification of the hypothesis and any necessary modification of the theory , is called the scientific method . Chemists study and describe the behavior of matter and energy in three different domains : macroscopic , microscopic , and symbolic .
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