Difficulty: Medium

Average Score: 69%

Which TWo of the following are characteristics of a scientific theory?

Rationale

It is based on evidence and it allows scientists to make predictions.

A scientific theory is a well-substantiated explanation of some aspect of the natural world, grounded in evidence gathered through observation and experimentation. Additionally, a key feature of scientific theories is their ability to generate predictions that can be tested, further reinforcing their validity.

A (It is based on evidence.) CORRECT

Scientific theories are constructed upon a solid foundation of evidence obtained through rigorous research and experimentation. This reliance on empirical data distinguishes scientific theories from mere conjectures and ensures they are subject to validation or falsification through further investigation.

B (It allows scientists to make predictions.) CORRECT

One of the defining features of a scientific theory is its capacity to allow scientists to make predictions about future observations or experimental outcomes based on the established principles of the theory. These predictions can then be tested and refined, contributing to the theory's credibility and scientific utility.

C (It is the controversial opinion of an individual scientist.) YOUR ANSWER

This choice misrepresents the nature of a scientific theory. While individual scientists may hold controversial opinions, a scientific theory is not simply an opinion. It must be widely accepted within the scientific community, based on significant evidence rather than personal belief, to be considered a valid theory.

D (It is an untested guess about why something happened.) YOUR ANSWER

This statement describes a hypothesis rather than a scientific theory. A scientific theory is supported by extensive testing and evidence, whereas an untested guess lacks the empirical foundation necessary to elevate it to the status of a theory.

Conclusion

A scientific theory is characterized by its basis in evidence and its predictive power, both of which are essential for its acceptance and application in the scientific community. In contrast, opinions and untested guesses do not meet the rigorous standards that define a true scientific theory, emphasizing the importance of empirical validation in scientific discourse.

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