Ev & Elpidio Salt Extension

The reason why the salt stick sticks to the insulator is because the salt is neutral and the insulator is negative. which means that the salt would stick to the insulator and bounce off the conductor. our proof is that when we charge the plastic rod and then hold it above the salt, the salt is forced upwards and sticks to the rod. and when we charge the pie tin and place it above the salt, the salt bounces right off becuase it is the same charge as the salt.