EVERYDAY SCIENCE

Detailed explanation-1: -The four main branches of physical science are astronomy, physics, chemistry, and the Earth sciences, which include meteorology and geology.

Detailed explanation-2: -Chemistry is the study of matter, analysing its structure, properties and behaviour to see what happens when they change in chemical reactions. As such, it can be considered a branch of physical science, alongside astronomy, physics and earth sciences including geology.

Detailed explanation-3: -Some of the major examples of physical chemistry are thermochemistry, which includes the study of heat energy of chemical reactions taking place during phase transitions like gas to liquid or vice versa. It tells us about entropy, heat capacity, Gibbs free energy, or heat of formations.

Detailed explanation-4: -The definition of a chemist is a person who studies the form and properties of substances such as acidity and density. An example of a chemist is a pharmacist. A person whose occupation specializes in the science of chemistry, especially at a professional level.