Changes of state

• The particle model

  A) Melting

  B) Evaporating

  C) Freezing

  D) Condensing

  E) Solid

  F) Liquid

  G) Gas

  
• Evaporating is the process by which a liquid turns into a gas.
• Melting is the process whereby a solid changes into a liquid.
• Freezing is the process by which a liquid turns back into a solid.
• Condensing is the process by which a gas turns back into a liquid.
• Solid - particles are close together, vibrate but do not move around much.
• Liquid - particles are closer than in gases but still have some space between them. They can slide past one another.
• Gas - particles have lots of space between them, move quickly and randomly.
• Fill the missing words in.

  A) Evaporation

  B) Condensation