The students should recognize that heating of liquids or gases causes a current since the heated medium has a lower density than the cold one and, thus, rises. In closed systems this leads to circulation. The current transports heat energy.
Principle
The students should recognize that heating of liquids or gases causes a current since the heated medium has a lower density than the cold one and, thus, rises.
In closed systems this leads to circulation. The current transports heat energy.
Benefits

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