1. Lesson 7: Just A Phase Key Terms

2. Solid A solid has definite volume and definite shape. The particles in a solid are closely packed and vibrate in relation to one another.

3. Liquid A liquid has definite volume, but no definite shape. A liquid takes on the shape of its container.

4. Gas A gas has no definite shape or volume. Its particles have enough energy to fill the entire container it is in.

5. The Phases of Matter

6. Melting Changing from a Solid to a Liquid

7. Freezing Changing from a liquid to a solid

8. Boiling Changing from a liquid to a gas at a substance’s boiling point. Also called vaporization

9. Evaporating Changing from a liquid to a gas at the surface of a liquid.

10. Condensing Changing from a gas to a liquid Due to a change in temperature

11. Latent Heat of Fusion The heat absorbed when a solid turns into a liquid

12. Latent Heat of Vaporization The heat absorbed when a liquid turns into a gas.