Question

A room heater is placed near the floor in a closed room. How do convection currents warm the room?

Options

• Cool air sinks near heater

• Warm air rises, cools, then sinks forming a cycle

• Warm air escapes outside

• Heat spreads only by radiation

Answer 1

Warm air rises, cools, then sinks forming a cycle

Explanation:

Air heated near the heater becomes less dense and rises, then cools and sinks, forming convection currents that circulate heat.