biology: The study of living things. The scientists who study them are known as biologists. chemical: A substance formed from two or more atoms that unite (bond) in a fixed proportion and structure. For example, water is a chemical made when two hydrogen atoms bond to one oxygen atom. Its chemical formula is H2O. Chemical also can be an adjective to describe properties of materials that are the result of various reactions between different compounds. chemistry: The field of science that deals with the composition, structure and properties of substances and how they interact. Scientists use this knowledge to study unfamiliar substances, to reproduce large quantities of useful substances or to design and create new and useful substances. People who work in this field are known as chemists. conductive: Able to carry an electric current. disrupt: (n. disruption) To break apart something; interrupt the normal operation of something; or to throw the normal organization (or order) of something into disorder. distort: (n. distortion) To change the shape or image of something in a way that …