[ 443 ] Physical Science GED ® TEST SCIENCE FLASH REVIEW • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Matter exists in solid, liquid, and gas states. A substance may change between these three states. State changes can alter the physical properties of a substance, as depicted in the following models. Solid Liquid Gas Which summary best explains the model of the states of matter? A. Liquids have a fixed shape like solids, but assume the volume of the container like gases. B. Liquids have a fixed volume and shape, like solids. Gases assume the volume and shape of the container. C. Liquids have a fixed volume like solids, but assume the shape of the container like gases. D. Liquids assume the volume and shape of the container, like gases. Solids have a fixed volume and shape.