Question

The best scientific theories not only explain and organize known facts but also __ __.

Answer 1

Answer:

The given blank can be filled with generate new predictions.

Explanation:

A scientific theory refers to an array of propositions created to illustrate a group of phenomena or facts in the natural world, which are confirmed recurrently via observation or experiment.  

An array of facts and associations between the facts, which can predict or illustrate the associated phenomena is considered as a theory. The best theories not only organize or illustrate the well-known facts, however, it also helps in generating new predictions.  

Answer 2

The best scientific theories not only explain and organize known facts but also generate new predictions