* Temperature and Kinetic Energy: Temperature is a measure of the average kinetic energy of the particles within a substance. Kinetic energy is the energy of motion.

* Heat Transfer: When heat is added to a substance, the particles absorb this energy. This absorbed energy causes the particles to move faster, increasing their kinetic energy.

* Increased Motion: As the particles move faster, they collide more frequently and with greater force. This increased motion is what we perceive as a higher temperature.

Think of it this way:

* Imagine a room full of people sitting still. The room is relatively cool (low kinetic energy).

* Now imagine everyone starts running around. The room feels warmer (higher kinetic energy).

The same principle applies to the particles within a substance. The more they move, the higher the temperature.