Describe the arrangement, separation and motion of liquid molecules.
The motion of tiny pollen grains suspended in water can be observed under a microscope.
Describe the path taken by a single pollen grain.
State the term used to describe this movement.
Explain, in terms of molecules, what causes this movement.
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.