Biology: Biology studies living organisms and the processes of life. It focuses on the structure and function of organisms, genetics, evolution, and the interactions between organisms and their environment. Topics in biology may include cell biology, plant biology, animal biology, ecology, and genetics.
Chemistry: Chemistry explores the composition and properties of matter and the changes it undergoes. It involves studying the structure and behavior of atoms, molecules, and compounds, as well as the chemical reactions that occur between substances. Topics in chemistry may include atomic structure, chemical bonding, chemical reactions, stoichiometry, and thermodynamics.
Physics: Physics investigates the fundamental laws that govern matter, energy, and the universe. It involves studying the properties and behavior of physical systems, forces, motion, energy transformations, and the interactions between matter and energy. Topics in physics may include mechanics, electromagnetism, optics, thermodynamics, and quantum mechanics.