Physics is the study of how matter and energy interact with each other and how they affect each other over time and through space. Physics functions in an exciting dimension. What we mean by this is that things keep changing in the world of physics with every discovery. As theories progress and discoveries are made, not only the answer but the whole question changes. Due to this, many individuals define physics by what it was rather than what it is and will be.
It is one of the oldest academic disciplines and, through its inclusion of astronomy, perhaps the oldest. Physics intersects with many interdisciplinary areas of research, such as biophysics and quantum chemistry, and the boundaries of physics are not rigidly defined.