6.S.IV.C.1

States of matter (solid, liquid, gas) in terms of molecular motion In gases, loosely packed atoms and molecules move independently and collide often. Volume and shape change readily. In liquids, atoms and molecules are more loosely packed than in solids and can move past each other. Liquids change shape readily but resist change in volume. In solids, atoms and molecules are more tightly packed and can only vibrate. Solids resist change in shape and volume.