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.
321 exam-style questions on CIE IGCSE Physics 2.1 Kinetic particle model of matter, covering 2.1.1 States of matter and changes of state, 2.1.2a Particle structure and motion in solids, liquids and gases, 2.1.2b Gas pressure and particle collisions, 2.1.2c Brownian motion, 2.1.3a The absolute scale of temperature, and 2.1.3b Pressure, volume and temperature of a gas. Each one has a worked solution and a mark scheme showing where the marks go.