Question 1

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

A scientific theory is characterized by its foundation in evidence and its capacity to facilitate predictions about future events or observations.

A) It is based on evidence.

This statement is correct as scientific theories are established through rigorous testing and validation of evidence gathered from numerous experiments and observations. The strength of a scientific theory lies in its reliance on empirical data, which supports its claims and allows for further investigation.

B) It allows scientists to make predictions.

This option is also correct, as one of the key features of a scientific theory is its ability to generate predictions that can be tested through experimentation. A robust theory not only explains existing phenomena but also provides a framework for anticipating future occurrences based on established principles.

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

This statement is incorrect because a scientific theory is not merely an opinion, especially one that is controversial. Scientific theories must be backed by substantial evidence and consensus within the scientific community rather than being based on individual beliefs or disagreements.

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

This option is also incorrect. A scientific theory is not an untested guess; instead, it is a well-supported explanation that has undergone rigorous testing. An untested guess would be more accurately described as a hypothesis, which precedes the development of a scientific theory.

Conclusion

In summary, the correct answers, A and B, define essential characteristics of a scientific theory: its basis in evidence and its predictive capabilities. Options C and D fail to capture the essence of a scientific theory, as they misrepresent its foundation and reliability within the scientific method.