Chemistry is divided into 3 subsections:

Physical chemistry deals with states of matter and energy changes. It gives a tour through solids, liquids, gases and solutions in terms of energy, behaviour and particle arrangement. It investigates the physical transitions between different states. It covers rates of reaction and equilibria. It explores whether energy is released or used by a reaction and how we can measure and compare this.

Organic chemistry focuses on the carbon-based molecules that make up living tissue, starting with alkanes and alkenes and developing into larger and more complex molecules such as the amino acids that make up proteins.

Inorganic chemistry involves using the periodic table to establish and explain trends in reactivity. At GCSE we focus on the extremely reactive groups 1 and 7 and the very unreactive group 0. Atomic structure, especially electron arrangement, can be used to predict reactivity and the formulae of compounds. We also learn how to test for and identify certain gases and ions.

Chemistry GCSE is a great option if you plan to study any science in greater depth beyond GCSE.