A current of part of the substance rising then dropping and repeating
Warm air rises, and cool air sinks.
The conventional currents will continue until the temperature of the substance is equal to surrounding temp.
False.
The Earth's core.
They move the hot and colder parts around.
hot, less dense air rises
convections
Current is at maximum
the convection currents will stop
the current in series will be same..
When a electro magnet is formed
it is slower