The particles of a solid are packed closely together, but they do not have as much movement as the particles in a gas or liquid.

Here's why:

* Solids: The particles in a solid are held in a fixed, rigid structure by strong attractive forces. They vibrate in place but don't have enough energy to move freely.

* Liquids: Particles in a liquid have more energy than solids. They can slide past each other, giving liquids their ability to flow.

* Gases: Gas particles have the most energy. They move freely and are far apart, resulting in the ability to expand to fill any container.

In short, the degree of particle movement decreases as you go from gas to liquid to solid.