Chemists are engaged in the study, analysis, characterization, modification, and calculation of physico-chemical or biochemical properties of matter. They perform chemical analysis on products that we export to ensure quality and the food and water that we consume to ensure safety. They discover, develop and improve products formulae, processes and analytical methods. Some chemists work toward the discovery of cures for cancer and other diseases. Some concentrate on developing new materials for carious industries such as electronics and rubber industries. Others focus on the analyses of evidences on crime scenes.