The scientific method is a body of techniques for investigating the world, acquiring new knowledge, or correcting previous knowledge consisting in systematic observation, measurement, and experiment, and the formulation, testing, and modification of hypotheses.
The scientific method is an iterative process involving the following steps:
Formulate hypotheses. Develop testable predictions
Conduct an experiment. Gather data to test predictions
Refine, alter, expand or reject hypothesis (either go on to 7 or go back to 3)
Develop or alter general theories.