What is Chemistry ?
Chemistry is the science of matter (that is, of all physical substances including gases and liquids as well as solids) and the changes that occur between different kinds of matter - especially chemical changes (called reactions) when types of matter are re-arranged into other types of matter e.g. water splitting into the gases hydrogen and oxygen.
Chemistry is one of the main three sciences (together with Biology and Physics) taught in many secondary schools.
Chemistry is a very wide discipline that includes many specific areas such as: