The transfer of heat by particles colliding with each other is called conduction.

Here's why:

* Conduction is the process where heat energy is transferred through direct contact between substances. When particles in a hotter substance collide with particles in a cooler substance, they transfer some of their kinetic energy. This results in the cooler substance gaining heat and the hotter substance losing heat.

Let me know if you'd like more information on the different methods of heat transfer!