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
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.