Question

A(n)

Answer 1

A theory is an explanation that unites the findings of many experiments, and it can be changed when new experimental results need to be explained. 

Answer 2

Answer:

A scientific theory is an explanation that unites the findings of many experiments, and it can be changed when new experimental results need to be explained.

Explanation:

A scientific theory is a set of concepts, including abstractions of observable phenomena and quantifiable properties, together with rules (scientific laws) that express the relationships between observations of such concepts. A scientific theory is constructed to fit the available empirical data on such observations, and is proposed as a principle or set of principles to explain a class of phenomena.