Properties and states of matter, density, magnetism, solubility, dissolving, conductivity essentials unit bundle to introduce and review your unit on how mass, volume, magnetism, relative density (sink/float), physical state (solid, liquid, gas), solubility, and thermal and electrical conductivity help describe matter and determine how materials are used in real life. Engage your students with this simple, effective, and high-quality resource for middle school science! No-prep, print-and-go,