Temperature is directly related to the average kinetic energy of the particles in a substance. Kinetic energy is the energy of motion. So, the faster the particles are moving, the higher the average kinetic energy, and the higher the temperature.

Here's a breakdown:

* Solids: Particles in solids are tightly packed and vibrate in place. The higher the temperature, the more vigorously they vibrate.

* Liquids: Particles in liquids have more freedom to move around. They slide past each other, and the higher the temperature, the faster they move.

* Gases: Particles in gases are far apart and move very rapidly in all directions. The higher the temperature, the faster they move and the more collisions they have.

Important Note: Temperature measures the average kinetic energy. This means that even at a specific temperature, there will be a range of speeds among the particles. Some will be moving faster, some slower.