Flow of an electrical charge in a circuit Prevents electrons from moving

provides a path for electrons to flow

electrons and electric current move easily

1.
electric current

2.
insulator

3.
electric circuit

4.
conductor

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?