As the largest of the academic departments, there is a wide variety of courses offered.
Biology, Chemistry and Physics are their own disciplines and are also offered as components of the general science courses.
Physics is the study of the natural world. It deals with the fundamental particles of which the universe is made, and the interactions between those particles, the objects composed of them (nuclei, atoms, molecules, etc) and energy.
Physics is the science of Nature - of matter and energy in space and time. Physicists study a wide range of physical phenomena covering enormous scales: from the subatomic particles to the Universe as a whole. All laws and forces of nature originate from mathematical symmetries of space and time, so modern physics currently focuses on studying these symmetries.
Physics is very dependent on mathematics. Models and theories in physics are expressed using mathematical equations. However, while physics uses mathematics to describe the material world, mathematics may deal with strictly abstract concepts and patterns. There is a large overlap between the two fields, known as mathematical physics.
Chemistry is the science of matter at or near the atomic scale. (Matter is the substance of which all physical objects are made.)
Chemistry deals with the properties of matter, and the transformation and interactions of matter and energy. Central to chemistry is the interaction of one substance with another, such as in a chemical reaction, where a substance or substances are transformed into another. Chemistry primarily studies atoms and collections of atoms such as molecules, crystals or metals that make up ordinary matter. According to modern chemistry it is the structure of matter at the atomic scale that determines the nature of a material.
Chemistry has many specialized areas that overlap with other sciences, such as physics, biology or geology. Scientists who study chemistry are called chemists. Historically, the science of chemistry is a recent development but has its roots in alchemy which has been practiced for millennia throughout the world. The word chemistry is directly derived from the word alchemy.
Biology is the branch of science dealing with the study of life. It describes the characteristics, classification, and behaviors of organisms, how species come into existence, and the interactions they have with each other and with the environment. Biology has many specialized areas, covering a wide range of scales, from biochemistry to ecology.