Changes of State

3. Changes / a physical change, a substance changes state when its energy increases or decreases by a sufficient amount
4. / occurs when particles of a liquid gain enough thermal energy to move independently
6. / reverse of melting, occurs when liquid particles lose enough thermal energy that the particles slow down so much that they form regular patterns
7. / changing from solid to liquid and occurs when a solid absorbs enough thermal energy to make its particles vibrate so fast that they break free from their fixed positions
9. / occurs when the particles of a substance gain so much thermal energy that the attractions between particles are completely overcome

1. / reverse of vaporization, occurs when liquid particles lose enough thermal energy to become a liquid
2. / vaporization that takes place only at the surface
5. point / temperature at which a liquid changes into a solid
8. energy / total kinetic and potential energy of all the particles
10. / water vapor escaping and when vaporization takes place in the whole substance because the entire substance is being heated.