An air conditioning unit near the ceiling of a room cools the surrounding air, creating a convection current.
What happens to the density of the air when it is cooled, and how does this cooled air move?
The density decreases and the cooled air moves upwards.
The density decreases and the cooled air moves downwards.
The density increases and the cooled air moves upwards.
The density increases and the cooled air moves downwards.
73 exam-style questions on CIE IGCSE Physics 2.3.2 Convection. Each one has a worked solution and a mark scheme showing where the marks go.