2. Phases of Matter Vocabulary

3. Heat of Fusion Amount of heat needed to change from a solid to a liquid

4. Viscosity resistance of a liquid to flow

5. Amorphous solid Solid that tends to lose its shape.

6. adhesion attraction between unlike molecules Ex. glue, tape

7. Crystal Solid structure with a regularly repeating pattern

8. attraction between like molecules Cohesion Ex. water droplets stick together… surface tension

9. Surface tension Force of attraction (cohesion) that occurs at the surface of a liquid

10. Condensation The changing of a gas to a liquid.

11. Sublimation The changing of a solid directly to a gas without being a liquid.

12. Evaporation The changing of a liquid to a gas at the surface. (Can occur at room temperature or cool temperatures.)

13. Heat of Vaporization Amount of heat needed to change from a liquid to a gas

14. Vaporization The changing of a liquid to a gas at the boiling point by adding heat.

15. Good luck on this week’s test!!!