The science of matter is called chemistry. It is the study of matter, chemical reactions, compositions, structures and properties. Chemistry is a form of natural science.
Aristotle's definition of the four elements of fire, water, earth and air in classical Greece was the first time a chemical hypothesis was introduced. Since then, chemistry has evolved into multiple branches that include biochemistry, physical chemistry, organic chemistry, inorganic chemistry and analytical chemistry. Chemistry has been credited as a bridge between physics and natural science, and it explains some phenomena, such as the rusting of iron and the efficiency of the clean-burning fuel propane.