Heather Buchan Heather, Any freshman text will define chemistry as the science of matter and its changes. That's a safe but perhaps overly terse definition, considering that matter is anything with mass that occupies space. Chemistry is a systematic study . Chemists have devised several good methods for solving problems and making observations. Chemists use well-defined techniques like spectroscopy and chromatography to study new or unknown substances.
Chemistry is the study of the composition and properties of matter .
Chemistry is the study of the reactivity of substances . One material can be changed into another by a chemical reaction. A complex substance can by made from simpler ones. Chemical compounds can break down into simpler substances. Fuels burn, food cooks, leaves turn in the fall, cells grow, medicines cure.