PHYSICS
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.
BIOLOGY
Biology is the natural science that studies life and living organisms, including their physical structure, chemical processes, molecular interactions, physiological mechanisms, development and evolution.
CHEMISTRY
Chemistry is the study of matter, its properties, how and why substances combine or separate to form other substances, and how substances interact with energy.
MATHEMATICS
The abstract science of number, quantity, and space, either as abstract concepts (pure mathematic ) or as applied to other disciplines such as physics and engineering