Physics is the scientific study of matter, energy, and the interactions between them. It seeks to understand and explain the fundamental laws that govern the universe, from the smallest particles to the largest galaxies. Physicists study a wide range of phenomena, including motion, forces, heat, light, sound, electricity, magnetism, and the structure of matter. They use mathematical models, experiments, and observations to make predictions and test theories. Physics plays a crucial role in many fields, including engineering, astronomy, chemistry, and biology, and has led to numerous technological advancements that have shaped the modern world.