In the scientific method (more specifically in the experimental method), an experiment consists of observing a phenomenon under conditions that the researcher can control. In other words, we can say that an experiment involves manipulating one variable (independent variable) and observing the effect on another variable (dependent variable).
The hypothesis is the guide for what should and should not be observed, what to look for, or what experiments to do, in order to discover some law of nature. Experience is one of the fundamental empiricist approaches needed to expand human knowledge.
