The molecules of a substance in a particular state of matter are closely packed in a regular arrangement, vibrating about fixed positions. The average kinetic energy of the molecules is increasing.
What is being described?
a solid being heated
a solid melting
a liquid being heated
a liquid freezing
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.