Simulations & Videos for

Lesson 1.2: Molecules in Motion

Accompanying Lesson Plan: Lesson 1.2: Molecules in Motion

Heating and Cooling a Liquid

  • The molecules in cold water move slowly and are close together.
  • As the water is heated, the molecules move faster and a little further apart.

Water Molecules at Different Temperatures

  • The circles represent water molecules.
  • The molecules are randomly arranged.
  • They interact with each other because of their attractions.
  • The motion lines show that they are moving.