Particle model of matter

• The forces in a solid are very strong
• The forces in a liquid is weaker than a solid
• A force in a gas is very weak
• The movement of a solid vibrates around a fixed position
• solids has a definite shape
• solids has a definite volume
• Liquids vibrate at random speeds and random directions
• Liquids have an indefinite shape and can flow
• Liquids have a definite volume
• Gasses move quickly
• Gasses do not have a definite shape
• There is an indefinite volume in a gas
• What is evaporation?


  It is the process of a liquid turning into a gas
• Melting is the process of a solid turning into a liquid
• What is freezing?

  It is the process of a liquid turning into a solid
• Condensing is the process of a gas turning into a liquid.
• What is internal energy?

  It is the energy stored inside a system by the particles
• What two types of energy make up internal energy?

  Kinetic and potential