Matching Pairs States of MatterOnline version Vocabulary game featuring states of matter. by Lindsay Carlson 1 2 3 4 5 6 the amount of matter in a specific area. Matter with a definite shape. Volume is the quantity of three-dimensional space enclosed by a closed surface. matter in a state in which it will expand freely to fill the whole of a container, having no fixed shape. takes the shape of its container and can flow. Water is an example. The three states are solid, liquid, and gas. Everything on earth exists in at least one state of matter.