Chemistry is the branch of science that focuses on the study of matter and its interactions with other matter and energy. It is often called the central science because it bridges other natural sciences, such as physics, biology, and environmental science, helping to explain the properties and behavior of substances that make up the world around us.

At its core, chemistry explores atoms and molecules, which are the building blocks of matter. These particles interact in various ways to form different types of substances, including solids, liquids, and gases. By studying these interactions, chemists can predict the behavior of materials, develop new substances, and create innovative solutions to complex problems.

The field of chemistry is divided into several branches, each focusing on different aspects of matter. Organic chemistry, for example, deals with the structure and reactions of carbon-containing compounds, which form the basis of life. Inorganic chemistry, on the other hand, focuses on non-carbon compounds and materials like metals, salts, and minerals. Physical chemistry explores the energy changes and dynamics of chemical reactions, while analytical chemistry involves techniques to determine the composition of substances. Biochemistry blends chemistry with biology to study the molecular mechanisms that underpin living organisms.