Think about what you know about the motion and spacing of the particles in each state of matter. how can this illustration of people at the theater be used as a model of solids, liquids, and gases? explain which group of people best represents the particles in a solid, liquid, and gas.

attractions between particles in matter hold the particles of liquids and solids close together. why do you think the attraction that particles have for each other is not enough to keep the particles in a gas close together? does the number of particles change as a gas spreads out?

think about the properties you have observed for solids, liquids, and gases. how might the arrangement and motion of the particles in each state result in these properties? describe and/or draw how you would model the particles in a solid, liquid, and gas.