Classical physics is a branch of physics that deals with the fundamental principles governing the behavior of matter and energy. It includes concepts such as Newton's laws of motion, thermodynamics, and electromagnetism. These principles were developed before the advent of modern physics and are applicable to everyday phenomena, like the motion of objects and the behavior of gases. This field primarily focuses on macroscopic systems, meaning it studies large-scale objects rather than atomic or subatomic particles. Classical physics laid the groundwork for many scientific advancements and remains essential for understanding basic physical concepts in areas like engineering and mechanics.