In scientific inquiry, an experiment (Latin: ex- periri, "to try out")'s a method of investigating causal relationships among variables. An experiment's a cornerstone of the empirical approach to acquiring data about the world and's used in both natural sciences and social sciences. An experiment can be used to help solve practical problems and to support or negate theoretical assumptions. Controlled experiments Many hypotheses in sciences such as physics can experiment causality by noting tha… (More on Experiment)