#C1.1a
describe the main features of the particle model in terms of states of matter and change of state
#C1.1b
explain in terms of the particle model the distinction between physical changes and chemical changes
#C1.1c
explain the limitations of the particle model in relation to changes of state when particles are represented by inelastic spheres (e.g. like bowling balls)
that it does not take into account the forces of attraction between particles, the size of particles and the space between them