My science

• Liquids


  • Moderate forces of attraction between molecules
  • Molecules free to move past each other but tend to stick together
  • Do not keep a definite shape, flow to fill container but keep the same volume
  • Molecules constantly moving in random motion, faster when hotter causing slight expansion
  • Cannot be compressed due to closely packed molecules
  • Quite dense, but not as dense as solids
• States of matter

  • Solids
  • Liquids
  • Gases
• Solids


  • Strong forces of attraction between molecules
  • Molecules held in fixed positions in a regular lattice arrangement
  • Definite shape and volume, don't flow like liquids
  • Molecules vibrate about their positions, more when hotter causing slight expansion
  • Cannot be compressed due to closely packed molecules
  • Generally very dense
• Gases


  • No forces of attraction between molecules
  • Molecules free to move, travel in straight lines and interact only when they collide
  • Do not keep a definite shape or volume, expand to fill any container, exert pressure on container walls
  • Molecules constantly moving in random motion, faster when hotter causing expansion or increased pressure
  • Can be compressed easily due to free space between molecules
  • All have very low densities