Density of Materials

• Density is the amount of mass per unit volume.
• In a solid - particles are tightly packed in a regular structure
• In a liquid - particles are tightly packed but free to move past each other
• In a gas - particles are spread out and move randomly
• Density can be calculated using the equation: density=mass/volume
• Density equation - p=m/V
• Density units depend on the units of the mass and volume

  It is usually g/cm3 or kg/m3
• 1 g/cm3 is equal to 1,000 kg/m3
• Label:

  A) Close

  B) Low to none

  C) High

  D) Fixed

  E) Variable

  F) High

  
• Label:

  A) Solid

  B) Liquid

  C) Gas

  
• Label

  A) Sublimation

  B) Melting

  C) Evaporating

  D) Condensing

  E) Freezing

  F) Deposition

  
• Evaporation - surface of a liquid becomes gas

  Boiling - entire liquid becomes gas
• Pure substances melt/boil at specific tempratures
• 1m3 = 1000000cm3