Thermal Energy

The energy of the moving particles in an object
Real World Example
Imagine you've been stuck in a crowded elevator with several people, each person shifting and fidgeting as the elevator moves. Just like those people moving around, thermal energy is the energy from the movement of particles within an object. The more the people (particles) are moving around due to agitation (heat), the more energy (thermal energy) the entire group (object) possesses, illustrating how increased movement leads to increased thermal energy.
Real World Example Illustration
Practice Version
