Which branch of science is primarily concerned with matter, energy, and the changes they undergo?

The branch of science that is primarily concerned with matter, energy, and the changes they undergo is Physical Science. This field encompasses various disciplines that study the fundamental properties and behaviors of the physical world. It includes important areas such as physics, which focuses on the laws of motion, forces, energy, and the interactions among different forms of matter, as well as chemistry, which deals with the composition, structure, properties, and changes of matter.

Understanding matter and energy, along with their interactions and transformations, is crucial in explaining a wide range of phenomena, from simple chemical reactions to complex physical systems. This foundational knowledge helps us grasp natural processes and is essential in many applied fields, such as engineering and technology.

While Life Science deals with living organisms and their biological processes, Earth Science focuses on the planet itself, including geology and meteorology, and Astronomy studies celestial bodies and the universe beyond Earth. These fields, while pivotal in their respective domains, do not primarily center around the direct interactions between matter and energy as Physical Science does.