Physics is the science devoted to the study of matter and energy.
Physicists try to understand what matter is and why it behaves the way it does.
They seek to learn how energy is produced, how it travels from place to place, and how it can be controlled. Physicists are also interested in how matter and energy are also interested in how matter and energy are related to each other over time and through space. The word physics comes from a Greek word meaning natural thing. Solid-state physicists developed the transistor and other semiconductor devices. Knowledge obtained from the study of physics is important in other sciences, including astronamy, biology, chemistry, and geology.