What term describes a hypothesis that may be revised later based on new evidence?

• A. A scientific theory
• B. A scientific law
• C. An experimental variable
• D. A prediction

Answer: (A)

A scientific theory is a term that refers to a well-substantiated explanation of some aspect of the natural world that is based on a body of evidence collected over time. Theories can and do change as new evidence emerges or as new technologies allow for better observations and experiments. This characteristic makes theories dynamic and responsive to new information, allowing them to be revised to accommodate advancements in understanding.

In contrast, a scientific law describes a phenomenon that consistently occurs under certain conditions but does not explain why it occurs. Experimental variables are factors that can be changed in an experiment to test a hypothesis, while a prediction is a specific statement about what will happen in a particular experiment or scenario based on a hypothesis or theory. None of these options encompass the idea of requiring ongoing revision based on new evidence in the same way that a scientific theory does.