Question

Which of the following is an example of convection?

• A. The heat of the sun warming our planet
• B. The heat from an electric stove warming a frying pan
• C. Ice cubes cooling a drink
• D. A microwave oven cooking a meal
• E. An overhead fan cooling a room

Answer 1

The correct option is E An overhead fan cooling a room

Convection is a form of heat transfer where a large number of molecules move from one place to another. An overhead fan works precisely by this method: it sends cooler air molecules down into a hot room, cooling the temperature of the room. The heat of the sun and the cooking action of a microwave are both forms of radiation, while the heat on a frying pan and the cooling action of ice cubes are both forms of conduction.