The process continues, a convection current is set up and heat is transferred through the air and hence through the room. Convection currents enable hot air balloons to rise, and also explain why ...

A beaker is heated and the coloured fluid inside shows convection currents This is because the particles in liquids and gases move faster when they are heated than they do when they are cold.

This broad, 8,000-mile-long bulge in the crust of the earth differs in many ways from the rest of the ocean bottom. It may be the result of huge convection currents in the interior ...