What Are Convection Currents?

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9. Hot Air Balloon

Hot air balloons can be a thrilling ride and make use of the science of convection to make flight possible. At the base of the balloon, over the basket, there is a heater. The heater heats air that rises and is trapped within the space, pushing the balloon upward as well.

In order to return back to the ground, the hot air is gradually released and when replaced by cold air, allows for lowering. This operation follows the action of convection currents whereby hot air becomes less dense and rises, while cold air becomes denser and falls.

Convection Currents

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