Studying physics helps us understand how the world works from the tiniest sub-atomic particles to the largest galaxies. Physics is defined as the study of matter, energy, and the interaction between them. Physicists study how the world around us works to discover the basic building blocks of matter, how the universe began, and how it will likely change. A degree in physics will prepare students for a future in any number of interesting fields from research and academia to health care and medicine to business development and computer games.