This document discusses various physical properties of materials including: 1) Conductivity, density, viscosity, malleability, hardness, odor, melting point, boiling point, filtration, and distillation are discussed as physical properties. 2) Physical changes alter some properties but do not change the substances. Examples given are evaporation and flammability. 3) Chemical changes form new substances with evidence including changes in color, production of gas, formation of precipitates, and temperature changes.