A solid metal bar is heated to a high temperature and then placed on a table in a much cooler room.
Which statement about the metal bar is correct as it sits in the cooler room?
Convection transfers energy throughout the solid metal bar.
The average kinetic energy of the metal atoms increases.
The internal energy of the metal bar decreases.
The metal bar expands slightly.
151 exam-style questions on CIE IGCSE Physics 2.1.2a Particle structure and motion in solids, liquids and gases. Each one has a worked solution and a mark scheme showing where the marks go.