1-16

• Everything is made out of atoms.
• Solids:

  • Fixed shape, mass and volume
  • Atoms packed very closely together
• Brick, phone, apple are examples of solids
• Liquids:

  • Mass and volume are fixed
  • Shape is determined by its container
  • Atoms roll over each other
• Wine, water and juice are examples of liquids.
• Gases:

  • Definite mass
  • No definite shape or volume
  • Takes shape of containers and spreads out
• Helium, oxygen, and nitrogen are examples of gases.
• what is the particle theory?


  Matter is made up of tiny particles that are always moving
• The Brownian motion model is a model of the movement of particles in a liquid.
• What is diffusion?

  Diffusion is the movement of particles from an area of high concentration to an area of low concentration.
• Chemical change: Where substances transform into entirely new substances with different chemical properties.
• Physical change: A type of change in which the form of matter is altered but one substance is not transformed
• Solid-Liquid?


  Melting
• Liquid-Gas?

  Evaporation
• Gas-Solid?

  Deposition/Sublimation
• Solid-Gas?

  Sublimation
• Gas-Liquid?

  Condensation
• Liquid-Solid?

  Freezing
• D= m/v
• M= dv
• V= m/d