Describe the arrangement of molecules and the spacing between molecules in a solid.
Describe the arrangement of molecules and the spacing between molecules in a gas.
State the name of the physical process by which a liquid changes into a solid.
State the name of the physical process by which a liquid changes into a gas at a temperature below its boiling point.
A student uses a microscope to observe pollen grains suspended in water.
State the name given to the random, continuous movement of the pollen grains.
Describe the path of a single pollen grain as viewed through the microscope.
The temperature of the water is increased. Describe any changes in the movement of the pollen grains.
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.