Matter & Energy

Matter is composed of atoms or groups of atoms called molecules. The arrangement of particles in a material depends on the physical state of the substance. In a solid, particles form a compact structure that resists flow. Particles in a liquid have more energy than those in a solid. They can flow past one another, but they remain close. Particles in a gas have the most energy. They move rapidly and are separated from one another by relatively large distances.


Ductility, property of a metal, an alloy, or any other material that allows forced deformation of the material to occur without breaking or splintering. The more ductile the material, the finer the wire that may be drawn through a metal die without breaking. See Metals.