matter in our surrounding

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Across
  1. 2. The rapid vaporization of a liquid
  2. 4. The heat required to convert a solid into a liquid at its melting point
  3. 6. A state of matter without a definite shape or volume
  4. 11. Another term for melting
  5. 12. The energy possessed by a body due to its motion
  6. 14. The process by which a gas turns into a liquid
  7. 16. The he process by which a solid turns into a liquid
  8. 18. A state of matter with a definite shape and volume
  9. 19. Heat The heat required to change the state of a substance without changing its temperature
  10. 20. A state of matter with tightly packed particles
Down
  1. 1. the space present between atoms
  2. 3. The heat required to convert a liquid into a gas at its boiling point
  3. 5. The ability of a substance to decrease in volume under pressure
  4. 7. The transition of a substance directly from solid to gas
  5. 8. The amount of space an object occupies
  6. 9. A measure of the average kinetic energy of particles
  7. 10. The process by which a liquid turns into a solid
  8. 13. The process by which a liquid turns into a gas
  9. 14. To change from gas to liquid
  10. 15. The spreading of particles from a region of higher concentration to a region of lower concentration
  11. 17. A state of matter with a definite volume but no definite shape