Here are the key differences between a scientific theory and a scientific law: - Scientific theory: A well-substantiated explanation of some aspect of the natural world that can incorporate facts, laws, inferences, and tested hypotheses. Theories are continually revised in light of new evidence. - Scientific law: A concise statement that describes a pattern in nature. Laws are factual descriptions of patterns in nature and do not explain those patterns. Laws are always true under the conditions specified. So in summary: - Theories are explanations, laws are descriptions. - Theories can change with new evidence, laws do not change. - Theories aim to explain phenomena, laws simply state relationships.