Skip Navigation

Chapter 1, Lesson 4 Multimedia

Particles of a Solid

  • The atoms of a solid are strongly attracted to each other
  • Solids keep their shape because of these strong attractions
  • The atoms vibrate but do not move past each other

Comparing Solid and Liquid

  • The atoms of a solid are so attracted to each other that they vibrate and don't move past each other.
  • The molecules of a liquid are attracted to each other, but move more freely than the atoms of a solid. The molecules of a liquid are able to move past one another.

Heating and Coooling a Metal Ball

  • At room temperature, the ball fits through the ring.
  • When the metal ball is heated enough, it will not fit through the ring.
  • When the ball is cooled back to room temperature, it fits through the ring again.

Heating and Cooling a Solid

  • When a solid is heated, the particles move faster and move slightly further apart
  • When a solid is cooled, the particles move slower and move slightly closer together

Molecules in a Room Temperature and Hot Metal Ball

A close-up on the particles in a room temperature metal ball. The molecules are close together and have little movement.A close-up on the particles in a hot metal ball. The molecules are further apart and have more movement.
  • At room temperature, the atoms in the ball vibrate but do not move past each other
  • When the metal ball is heated, the atoms vibrate faster. Their motion competes with their attractions and the move a little further apart