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# Long description

Three beakers (labelled A, B and C) show how one student conceptualises the particles in water vapour, liquid water and ice. The particles are represented by blue spheres. Beaker A (labelled ‘Beaker containing water vapour’) and shows the blue spheres are randomly placed, far apart and occupy the whole beaker. Beaker B (labelled ‘Beaker of water’) shows the blue spheres are closer together, but not touching. They occupy the lower half of the beaker. Beaker C (labelled ‘Beaker of frozen water’) shows the blue spheres organised in three rows in the bottom half of the beaker. The spheres are touching each other and there are no spaces between them.