What is Physics and Why Study It?
Physics is the fundamental natural science. It is concerned primarily with discovering and applying the rules (natural laws) that govern the properties and behavior of all forms of inanimate matter and energy and their interactions. The objects or systems that physicists study vary in size from the smallest building blocks of the universe (whether they be quarks, or superstrings, or some even more exotic entities) to the entire known universe itself. The time scale of events considered in physics ranges from the moment the universe was created in the "Big Bang" to the almost unimaginably remote future, with physicists developing conceptual models for the birth, evolution, and ultimate fate of the universe.