If they confirm it, make more predictions and test it further. These steps are repeated continually, building a larger and larger set of well-tested hypotheses to explain more and more phenomena. The scientist should be impartial, considering all known evidence, and not merely the evidence which supports the hypothesis being developed. This makes it more likely that the hypotheses formed will be relevant and useful. This makes it possible for others to repeat the observations independently to check for bias.
Scientists also try to use operational definitions of their measurements.
That is, measurements and other criteria for observation are defined in terms of physical experiments that can be performed by anyone, rather than being defined in terms of abstract ideas or common understanding. Under these definitions, we can discover that these times are slightly different, and that tells us something about how the Earth moves. In the hypothetical stage, scientists use their own creativity or any other methods available to invent possible explanations for the phenomenon under study. For example, after a storm a tree is noticed to have fallen. That is, in order to predict what measurements one might find if you conduct an experiment, treat the hypothesis as a premise , and reason deductively from that to some non-obvious conclusion, then test that conclusion.