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Across 8. that state of matter that has a definite volume and takes the shape of its container. 10. The temperature at which a solid becomes a liquid. 11. Referred to as "energy of position". 13. The amount of energy required to change a solid to a liquid at its melting point. 14. The state of matter that does not have a fixed volume or shape. 15. The vaporization of a liquid that can occur throughout the liquid, not just at the surface. 16. The total energy of the particles that make up a substance, it includes both the kinetic and potential energy of the particles.

Down 1. A measurement of the average kinetic energy of the particles that make up a substance. 2. The process of a liquid turning to a gas at the surface. 3. The process of a solid changing directly to a gas. 4. States that the particles of a gas are in constant, random motion and collide with each other and the walls of its container without losing any energy. 5. The temperature where the pressure of the vapor in a liquid is equal to the pressure acting on the surface of the liquid. 6. The amount of energy required to convert a liquid to a gas at its boiling point. 7. The state of matter that has definite shape and volume. 9. Referred to as "energy of motion". 12. Can exist as a solid, liquid, gas or plasma.