Physical Properties Phase: State of matter such as solid, liquid or gas. Viscosity: Tendency of a liquid to NOT Flow. Thick liquids have high viscosity and flow slowly. Conductivity: Ability to allow heat, cold, and electricity to travel through it. Malleability: Ability to be hammered and flattened without breaking. Density: Measure of how close atoms are compacted together. Ductility: Capable of being stretched out into a wire shape. Solubility: Ability to dissolve substances. Boiling Point: Temperature at which a liquid turns to gas. Melting Point: Temperature at which a solid turns to liquid. Illustrations