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A key function in this step in the scientific method is deriving predictions from the hypotheses about the results of future experiments, and then performing those experiments to see whether they support the predictions.
A good scientific model should include a mechanism. When scientists construct a model, they are hypothesising that some poorly understood aspect of the real world can be compared (at least in some respects) to a mechanism that is well-understood. Every scientific model must be refutable or falsifiable â that is, there must be a way of testing whether it is false.