Unit 2 Vocabulary Crossword

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Across
  1. 2. This occurs when a gas changes to a solid without going through its liquid phase
  2. 10. This occurs when a liquid becomes a gas
  3. 11. For most substances, the ________ of the solid state is greater than it is for the liquid state
  4. 12. The state of matter in which the volume and shape of a substance are fixed
  5. 14. The force exerted by the collisions of particles with surfaces around them
  6. 15. This occurs when a gas becomes a liquid
  7. 18. A measure of the average kinetic energy of the particles that make up a substance
  8. 19. Liquid water and solid water have the same _________ identity
  9. 20. The state of matter that can change both shape and volume
Down
  1. 1. This occurs when a solid changes to a gas without going through its liquid phase
  2. 3. A change of state is a _________ change since the chemical identity of the substance remains the same
  3. 4. The _________ point is the temperature at which evaporation begins
  4. 5. This type of energy is the total kinetic energy of all the particles in a substance
  5. 6. The _________ point is the temperature at which melting begins
  6. 7. Even though the chemical identity of a substance does not change during a change of state, it will have _________ physical properties before and after the change
  7. 8. This type of energy is the energy of motion; as speed increases, so does this energy
  8. 9. The state of matter that has a fixed volume, but can change shape
  9. 13. A form of energy that can add or remove kinetic energy from a substance
  10. 16. This occurs when a liquid becomes a solid
  11. 17. This occurs when a solid becomes a liquid