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2 Thermal physics
2.1 Kinetic particle model of matter
2.1.1 States of matter
1 Know the distinguishing properties of solids, liquids and gases
2 Know the terms for the changes in state between solids, liquids and gases (gas to solid and solid to gas
transfers are not required)
2.1.2 Particle model
1 Describe, qualitatively, the particle structure of solids, liquids and gases, relating their properties to the
forces and distances between particles and to the motion of the particles (atoms, molecules, ions and
electrons)
2 Describe the relationship between the motion of particles and temperature, including the idea that there
is a lowest possible temperature (−273°C), known as absolute zero, where the particles have least kinetic
energy
3 Describe the pressure and the changes in pressure of a gas in terms of the forces exerted by particles
colliding with surfaces, crea
