Matter in our Surroundings

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Across
  1. 4. change of vapors to liquid
  2. 6. change of liquid to vapors
  3. 7. conversion of solid directly to gas
  4. 9. amount of water vapor present in air
  5. 14. measure of how easily a substance can be squeezed or compressed under pressure.
  6. 17. group of two or more atoms held together by chemical bonds.
  7. 18. solid carbon dioxide
  8. 19. state of matter with a definite shape and volume
  9. 20. another name for melting
Down
  1. 1. the temperature at which a substance begins to melt.
  2. 2. hidden heat involved in the change of state of a matter
  3. 3. change of liquid to gas at the surface
  4. 5. a substance composed of two or more different elements chemically combined in a fixed ratio
  5. 8. state of matter with no definite shape or volume, where particles are far apart and move freely
  6. 10. anything that has mass and occupies space
  7. 11. spreading out and mixing of particles in a medium
  8. 12. state of matter with a definite volume but no definite shape
  9. 13. smallest form of matter which can exist independently
  10. 15. general name for atoms, molecules, elements, etc.
  11. 16. SI unit of temperature