Materials

• Diffusion= spread out of materials due to their particles moving
• Melting point= temp at which a solid changes to liquid
• Evaporation= changing a liquid to a gas at the surface of the liquid
• Condensation= changing of a gas to a liquid
• 3 states of matter

  1. solid
  2. liquid
  3. gas
• Matter= anything that occupies space and has mass
• Solids

  • definite shape
  • can’t be compressed
  • don’t flow
• Liquids

  • no definite shape
  • can’t be compressed
  • more freedom of movement than a solid
• Gas

  • no definite shape
  • can be compressed
  • continuously moving around
• Particle theory

  • all matter is made of particles called atoms, which are chemically bonded to one another
  • these particles determine the properties of solids, liquids, gases
• Changes the state of matter by:

  • melting
  • boiling
  • condensing
  • Freezing