The table below gives some examples of convection and explanations of how the convection occurs.

Which row is correct?

	Example	Explanation
A	Refrigerator	The cooling element is placed at the top because cold air becomes less dense and rises, cooling the upper compartments first.
B	Boiling water in a kettle	Water at the bottom is heated, becomes less dense, and rises, transferring thermal energy upward.
C	Room heater (radiator)	The radiator is placed near the floor because hot air becomes denser and sinks, spreading across the floor.
D	Daytime sea breeze	Air over the sea heats up faster than air over the land, causing the warm air over the sea to rise and cold air from the land to blow towards the sea.

The table below gives some examples of convection and explanations of how the convection occurs.

Which row is correct?

	Example	Explanation
A	Refrigerator	The cooling element is placed at the top because cold air becomes less dense and rises, cooling the upper compartments first.
B	Boiling water in a kettle	Water at the bottom is heated, becomes less dense, and rises, transferring thermal energy upward.
C	Room heater (radiator)	The radiator is placed near the floor because hot air becomes denser and sinks, spreading across the floor.
D	Daytime sea breeze	Air over the sea heats up faster than air over the land, causing the warm air over the sea to rise and cold air from the land to blow towards the sea.

2.3.2 Convection

2.3.2 Convection Questions