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Chapter 1, Lesson 1 Multimedia

Particles of a Liquid

  • The little spheres represent water molecules.
  • Molecules are in constant motion.
  • The attractions water molecules have for each other keep them close together.
  • They can move past each other but their attractions keep them from moving far apart from each other.

Water Molecules

A simplified diagram of water 'molecules' in room temperature water.  The water molecules are represented as circles.
  • The circles in this drawing represent water molecules.
  • They are not in any exact order, but are near each other because of their attractions.
  • The motion lines near some of the circles show that the molecules are in motion.

Water Balloon

Water molecules are so attracted to each other that even after the balloon pops, the water molecules stay together keeping the shape of the balloon.