A procedure is discussed that matches bond graph formalism to the scattering formalism which is convenient in power transfer analysis. Various concepts of scattering formalism are introduced with the aid of a simple example of interaction between two physical systems represented by bond graphs. The “reduced bond graph” is then defined and a procedure is developed to derive the scattering relations from this reduced graph. This procedure, which links the bond graph formalism to the scattering formalism provides the “analyst” with a bond graph-based complementary tool for the investigation of the power distribution in physical systems.