Chemistry is a branch of physical science that studies the composition, structure, properties and change of matter. It is chiefly concerned with atoms and molecules and their interactions and transformations.
Physics or ‘knowledge of nature’ is a natural science involving the study of matter and its motion through time and space, along with related ideas such as energy and force. More broadly, it is the general study of nature, conducted in order to understand how the universe behaves.
Mathematics enables you to seek out patterns and discover new concepts through the study of quantity (numbers), structure, space and change. The mathematical sciences include areas of study that are primarily mathematical for example statistics, data science, theoretical physics or actuarial science.