Mass - Something that measures the amount of matter in a substance or an object. Volume - The quantity of three-dimensional space enclosed by a closed surface. Melting point - The temperature at which a given solid will melt. (32°F) Boiling point - The temperature at which a liquid boils and turns to vapor. (212°F) Density - The degree of compactness of a substance. Conductivity - The degree to which a specified material conducts electricity. Solubility - The ability of a solid, liquid, or gaseous chemical substance to dissolve in a solvent (a solvent is a liquid.) Magnetism - A physical phenomenon produced by the motion of electric charge.