So, my intuition tells me that as a material heats up, the atoms start jiggling around more and more. That makes the atoms got all over the place, effectively causing more space between the atoms. Since there is more "free" space between the atoms that the electrons can travel through, the resistance must go down. However why is it not shown in real life? The resistance goes down as the temperature goes down. Look at super conductors. Since the cooler material's atoms are moving at a slower rate, I must assume that the material is also smaller, therefore less space to squeeze through and more resistance. But at the higher temperature, the atoms are going crazy, figuratively jumping from wall to wall, so there must be more collisions with the electrons. That would bring down the resistance. Can anyone point out where my intuition is flawed?