Matter Unit perfect for teaching properties of materials, states of matter, mixtures and solutions, solubility, chemical and physical changes, conductors and insulators, density and layers, magnetism, new vocabulary STEM challenges and activities. Properties of materials (density, mass, volume, magnetism, & electrical conductivityStates of matter (freezing, melting, and boiling points)Mixtures and solutionsSolubilityChemical and physical changesConductors & insulatorsDensity & densit