Scientists base many of their investigations on questions that test accepted theories. Which outcome of an investigation would cause a scientist to ask a different question?

AThe observed results are different from the expected results.
BThe investigation had many sources of error.
CAnother scientist proposed the same theory.
DThe expected results could be explained in different ways.

Discrepancies between observed and expected results drive scientists to question established theories and explore new hypotheses. This is essential for advancing scientific understanding. Other factors may prompt inquiry but do not spark the same challenge to existing theories.

Explanation:

Investigating Scientific Theories

In scientific investigations, observed results can often differ significantly from what is predicted. This discrepancy serves as a vital component of the scientific method, where scientists reevaluate their hypotheses and ask new questions. For example, if a scientist expects a particular reaction in a chemistry experiment, but the results come out unexpectedly, it raises several considerations:

Could there be a flaw in the current understanding of the theory?

Are there additional variables at play that weren’t initially considered?

Should a new hypothesis be formulated based on this unexpected evidence?

Therefore, the most appropriate outcome that would lead a scientist to ask a different question is when observed results are different from the expected results. This outcome challenges existing theories and promotes further inquiry, which is fundamental to advancing scientific knowledge.

Other Considerations

While other options presented, such as numerous sources of error, identification of similar theories by other scientists, or various explanations for expected results, could lead to inquiry, they do not fundamentally prompt the same level of questioning regarding theories as dissimilar observed results do.

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