changing state

• what is the change called when going from a solid to a liquid?

  melting
• what is the change called when going from a liquid to a gas?

  boiling
• what is the change called when going from a gas to a liquid?

  condensing
• what is the change called when going from a liquid to a solid?


  freezing
• describe the process of melting?


  when a solid is heated the particles gain more energy and vibrate more sealing the forces of the particles, at a certain point there will be enough energy for them to break free from their positions
• describe the process of boiling?

  when a liquid is heated, the particles gain more energy, making them move faster weakening the bonds, at a certain point these will break
• describe the process of condensing?


  as a gas cools the particles no longer have enough energy to overcome forces of attraction between them, bonds form so the gas particles become a liquid
• describe the process of freezing?

  when a liquid cools the particles have less energy so move around less, forming bonds between them then turning into a solid