Maths, Physics Revision Physicss Maths Physics Physics A Level Physics Home Maths Maths Revision hut Particles in solids,liquids  and gases In a solid the particles are packed close together in fixed pattern (structure) and cannot move Solid Liquid In a liquid the particles are  still touching each other but are not in a pattern and  can move around ( a liquid can flow) Gas In a gas the particles are not touching and can move around at random in all directions