 All changes of state are physical changes.  The change requires a change in energy. If energy is removed, then the particles move slower (water to
{"Image DocumentName": "Changes of State All changes of state are physical changes.", "Image ImageDescription": "The change requires a change in energy. If energy is removed, then the particles move slower (water to ice). If energy is added, then the particles move faster (raising the temperature). Heat, which is a transfer of energy, causes temperature changes, which causes a change in state.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}