Matter is anything that has volume and mass. Volume is the amount of space an object occupies and is measured in cubic units like cubic meters (m3) or cubic centimeters (cm3) for solids. Liquids are measured using a graduated cylinder. Mass is the amount of matter in an object and is measured in kilograms (kg), while weight is the measure of gravitational force on an object measured in Newtons. A physical change alters physical properties like state but does not change identity, while a chemical change produces new substances.