Matter in our surroundings

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Across
  1. 2. solid carbon dioxide
  2. 5. a change of gaseous state directly to solid state without going to liqiud state
  3. 7. have no fixed shape but have a fixed volume
  4. 11. have a tendency to maintain their shape when subjected to outside force
  5. 13. causes cooling
  6. 14. a bulk phenomenon
  7. 15. example of matter in which various forms are present in variable ratios
Down
  1. 1. mass per unit volume of a substance
  2. 3. building blocks for all forms of matter
  3. 4. made up of 2 or more atoms
  4. 6. process in which certain solids directly changes to gases on heating
  5. 8. temperature at which solid starts melting
  6. 9. energy produced due to movement of particles
  7. 10. the tendency to flow
  8. 12. hidden heat that cannot be obtained in thermometer