Thermal energy is produced when a rise in temperature causes atoms and molecules to move faster and collide with each other. The energy that comes from the temperature of the heated substance is called thermal energy.
The individual atom or molecules are strongly attracted and bonded to each other.
Non-vibrate molecules - zero thermal energy (WTH =0)
Vibrate molecules - finite thermal energy (WTH> 0)
The atoms or molecules move about in the material.
The atoms or molecules move freely and randomly throughout the containing volume.