Physics C - Particle Model of Matter

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Across
  1. 4. The coldest temperature possible (8,4)
  2. 6. Liquid to solid change of state (8)
  3. 8. Scientific Unit of Temperature, starting at 0 (6)
  4. 13. A measure of how hot something is, determined by the average KE of each particle (11)
  5. 17. The change of volume of water when an object is placed in it (10)
  6. 18. Force exerted per unit area (8)
  7. 20. The conversion solid to liquid at a constant temperature (7)
  8. 23. Name given the heat energy used to change the state of matter of a sample at a constant temperature (6)
  9. 25. Description of the temperature during change of state (8)
  10. 27. Another name for a gas (5)
  11. 28. Type of latent heat concerned with converting a liquid to solid (6)
  12. 30. The energy required to raise 1kg of a material by 1' C (8,4,8)
  13. 33. The flow patterns of particles caused by regions in a medium of different temperature (10,7)
  14. 34. Quantity measured in Newtons per square meter (8)
  15. 37. Unit of Energy or Work Done (5)
  16. 38. The Kinetic plus Potential energy contained in a substance (8,6)
  17. 41. Type of Energy associated with the arrangement of particles (9)
  18. 42. The transfer of heat energy by means of Electromagnetic waves (9)
  19. 43. State of matter which has a high density and regular structure of atoms (5)
  20. 44. The process of a liquid converting to a gas at a temperature below its boiling point (11)
  21. 45. Change of state from solid directly to gas (11)
Down
  1. 1. The S.I. unit of mass (8)
  2. 2. Substance which has density of 1 g / cm^3 (5)
  3. 3. The transfer of heat energy by moving particles carrying it (10)
  4. 5. Change of state: liquid to gas (7)
  5. 7. Another name for 'work done' to or by an object (6)
  6. 9. Fillable metal cube of 4 different colour sides used to test the thermal radiating ability of different colours or materials (6, pronoun)
  7. 10. The amount of space taken up by an object (6)
  8. 11. Type of material very good at conducting heat (5)
  9. 12. Apparatus used to find volume of irregular shaped objects (12,3)
  10. 14. Unit of pressure (6)
  11. 15. Property of a material expressing mass per unit volume (7)
  12. 16. Unit of force (6)
  13. 19. Energy associated with movement (7)
  14. 21. The prevention of heat transfer into, out of or through a material (10)
  15. 22. Device used to measure pressure (9)
  16. 24. Apparatus used to measure the mass of an object (3,3,7)
  17. 26. Device used to measure temperature (11)
  18. 29. Quantity describing the amount of matter present in an object (4)
  19. 31. The transfer of heat energy through a solid (10)
  20. 32. Unit of temperature scale (7)
  21. 35. Description of directions of gas particle movements (7)
  22. 36. Pink-brown metal often used as heat sinks because of its Low Specific Heat Capacity (6)
  23. 39. State of matter in which particles have zero potential energy (3)
  24. 40. State of matter of high density but random arrangement of particles (6)