Answer
Energy is required for the motion of particles during the movement of solids, liquids, and gases. Solids have a definite shape and volume, with particles vibrating in a fixed position. Liquids have an indefinite shape but a definite volume, with particles sliding past each other. Gases have an indefinite shape and volume, with particles moving rapidly and far apart. The phase transition between the particles occurs during the movement of the particles, with little or a lot of energy required depending on the distance and definite or indefinite nature of the particles.