Chemistry being the branch of science concerned with the substances of which matter is composed, the investigation of their properties and reactions, and the use of such reactions to form new substances.
Biology is the order of kingdoms, systems, organs, tissues and cells in animals and plants from taxonomy to phylogeny of organisms, cell structure, molecules and the central dogma of biology.
Physics is the branch of science concerned with the nature and properties of matter and energy. The subject matter of physics includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms.
