Which statement best explains why a gas can be easily compressed under pressure while a solid cannot?
The particles in a gas are separated by large average distances, whereas the particles in a solid are closely packed.
The particles in a gas have much higher kinetic energy than those in a solid.
The individual particles in a gas can shrink in size when pressurized.
The particles in a solid are held together by much weaker forces than those in a gas.
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.