It is the temperature difference between the two neighboring objects that causes this heat transfer. You have hopefully adopted an understanding of heat as a flow of energy from a higher temperature object to a lower temperature object. The more the particles vibrate, translate and rotate, the greater the temperature of the object. Temperature is a measure of the average amount of kinetic energy possessed by the particles in a sample of matter. These motions give the particles kinetic energy.
You should be developing a model of matter as consisting of particles which vibrate (wiggle about a fixed position), translate (move from one location to another) and even rotate (revolve about an imaginary axis). If you have been following along since the beginning of this lesson, then you have been developing a progressively sophisticated understanding of temperature and heat.
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