states of matter

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Across
  1. 4. hot, highly ionized, electrically conducting gas
  2. 6. regular geometric pattern of particles in most solids, giving a solid a definite shape and volume
  3. 7. substances with densely packed particles
  4. 8. change of state from a liquid to a gas, involving thermal energy
  5. 10. substances with particles that slide past each other
  6. 11. process by which a cooling gas changes into a liquid and releases thermal energy
  7. 12. process by which a gas changes to a solid without first entering a liquid state
Down
  1. 1. process by which a cooling liquid changes into a solid and releases thermal energy
  2. 2. substances with particles that are separated by large distances that travel at high speeds
  3. 3. change of state from a solid to a liquid, involving thermal energy
  4. 5. process by which a solid slowly changes to a gas without first entering a liquid state
  5. 9. solid that consists of densely packed particles arranged randomly